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  • Decode MP4 h264 RTP Video Stream C++

    26 juin 2022, par laurrrr

    I want to send a mp4 video which is h264 encoded to another C++ Application and get raw video data.

    


    I'm sending rtp packets using ffmpeg using following command :

    


    ffmpeg -re -i video.mp4  -pix_fmt rgb24  -vcodec libx264 -b:v 10506k -bufsize 64000k -r 30.0 -f mp4 -f rtp rtp://192.168.1.101:4500?pkt_size=1316 


    


    and this is ffmpeg output after video has been played :

    


    Output #0, rtp, to 'rtp://192.168.1.101:4500?pkt_size=1316':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    Stream #0:0(und): Video: h264 (libx264), yuv444p, 1280x720, q=-1--1, 10506 kb/s, 30 fps, 90k tbn, 30 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/10506000 buffer size: 64000000 vbv_delay: -1
SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 192.168.1.101
t=0 0
a=tool:libavformat 58.29.100
m=video 4500 RTP/AVP 96
b=AS:10506
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1

frame= 1802 fps= 24 q=-1.0 Lsize=   78043kB time=00:00:59.96 bitrate=10661.4kbits/s speed=0.793x     
video:77209kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.080008%
[libx264 @ 0x55c75bcc0f00] frame I:8     Avg QP:20.85  size:175353
[libx264 @ 0x55c75bcc0f00] frame P:654   Avg QP:24.51  size: 68884
[libx264 @ 0x55c75bcc0f00] frame B:1140  Avg QP:30.52  size: 28604
[libx264 @ 0x55c75bcc0f00] consecutive B-frames: 12.9%  6.1%  6.7% 74.4%
[libx264 @ 0x55c75bcc0f00] mb I  I16..4: 20.2%  0.0% 79.8%
[libx264 @ 0x55c75bcc0f00] mb P  I16..4:  8.5%  0.0% 16.2%  P16..4: 31.2% 22.3% 11.2%  0.0%  0.0%    skip:10.7%
[libx264 @ 0x55c75bcc0f00] mb B  I16..4:  2.3%  0.0%  3.6%  B16..8: 42.1% 21.3%  6.3%  direct: 5.8%  skip:18.5%  L0:53.9% L1:27.7% BI:18.4%
[libx264 @ 0x55c75bcc0f00] coded y,u,v intra: 63.6% 18.5% 5.0% inter: 36.9% 3.5% 1.3%
[libx264 @ 0x55c75bcc0f00] i16 v,h,dc,p: 23% 30% 25% 22%
[libx264 @ 0x55c75bcc0f00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 23% 23%  6%  6%  5%  7%  4%  7%
[libx264 @ 0x55c75bcc0f00] Weighted P-Frames: Y:26.3% UV:10.4%
[libx264 @ 0x55c75bcc0f00] ref P L0: 67.4% 18.1% 10.9%  2.9%  0.7%
[libx264 @ 0x55c75bcc0f00] ref B L0: 97.4%  2.1%  0.5%
[libx264 @ 0x55c75bcc0f00] ref B L1: 98.8%  1.2%
[libx264 @ 0x55c75bcc0f00] kb/s:10529.89


    


    On my C++ Application I'm using a 3rd party rtp library for capturing rtp frames and this is what I get during video stream :

    


    TS = 4178129015 | RTP Payload = 96 | SeqNr = 618 | Len = 25
Payload Data : 
67 f4 0 20 91 9b 28 a 0 b7 42 0 0 3 0 2 0 0 3 0 
78 1e 30 63 2c 
TS = 4178129015 | RTP Payload = 96 | SeqNr = 618 | Len = 5
Payload Data : 
68 eb ec 44 80 
TS = 4178129015 | RTP Payload = 96 | SeqNr = 618 | Len = 760
Payload Data : 
6 5 ff ff f4 dc 45 e9 bd e6 d9 48 b7 96 2c d8 20 d9 23 ee 
ef 78 32 36 34 20 2d 20 63 6f 72 65 20 31 35 35 20 72 32 39 
31 37 20 30 61 38 34 64 39 38 20 2d 20 48 2e 32 36 34 2f 4d 
50 45 47 2d 34 20 41 56 43 20 63 6f 64 65 63 20 2d 20 43 6f 
70 79 6c 65 66 74 20 32 30 30 33 2d 32 30 31 38 20 2d 20 68 
74 74 70 3a 2f 2f 77 77 77 2e 76 69 64 65 6f 6c 61 6e 2e 6f 
72 67 2f 78 32 36 34 2e 68 74 6d 6c 20 2d 20 6f 70 74 69 6f 
6e 73 3a 20 63 61 62 61 63 3d 31 20 72 65 66 3d 33 20 64 65 
62 6c 6f 63 6b 3d 31 3a 30 3a 30 20 61 6e 61 6c 79 73 65 3d 
30 78 31 3a 30 78 31 31 31 20 6d 65 3d 68 65 78 20 73 75 62 
6d 65 3d 37 20 70 73 79 3d 31 20 70 73 79 5f 72 64 3d 31 2e 
30 30 3a 30 2e 30 30 20 6d 69 78 65 64 5f 72 65 66 3d 31 20 
6d 65 5f 72 61 6e 67 65 3d 31 36 20 63 68 72 6f 6d 61 5f 6d 
65 3d 31 20 74 72 65 6c 6c 69 73 3d 31 20 38 78 38 64 63 74 
3d 30 20 63 71 6d 3d 30 20 64 65 61 64 7a 6f 6e 65 3d 32 31 
2c 31 31 20 66 61 73 74 5f 70 73 6b 69 70 3d 31 20 63 68 72 
6f 6d 61 5f 71 70 5f 6f 66 66 73 65 74 3d 34 20 74 68 72 65 
61 64 73 3d 36 20 6c 6f 6f 6b 61 68 65 61 64 5f 74 68 72 65 
61 64 73 3d 31 20 73 6c 69 63 65 64 5f 74 68 72 65 61 64 73 
3d 30 20 6e 72 3d 30 20 64 65 63 69 6d 61 74 65 3d 31 20 69 
6e 74 65 72 6c 61 63 65 64 3d 30 20 62 6c 75 72 61 79 5f 63 
6f 6d 70 61 74 3d 30 20 63 6f 6e 73 74 72 61 69 6e 65 64 5f 
69 6e 74 72 61 3d 30 20 62 66 72 61 6d 65 73 3d 33 20 62 5f 
70 79 72 61 6d 69 64 3d 32 20 62 5f 61 64 61 70 74 3d 31 20 
62 5f 62 69 61 73 3d 30 20 64 69 72 65 63 74 3d 31 20 77 65 
69 67 68 74 62 3d 31 20 6f 70 65 6e 5f 67 6f 70 3d 30 20 77 
65 69 67 68 74 70 3d 32 20 6b 65 79 69 6e 74 3d 32 35 30 20 
6b 65 79 69 6e 74 5f 6d 69 6e 3d 32 35 20 73 63 65 6e 65 63 
75 74 3d 34 30 20 69 6e 74 72 61 5f 72 65 66 72 65 73 68 3d 
30 20 72 63 5f 6c 6f 6f 6b 61 68 65 61 64 3d 34 30 20 72 63 
3d 63 62 72 20 6d 62 74 72 65 65 3d 31 20 62 69 74 72 61 74 
65 3d 31 30 35 30 36 20 72 61 74 65 74 6f 6c 3d 31 2e 30 20 
71 63 6f 6d 70 3d 30 2e 36 30 20 71 70 6d 69 6e 3d 30 20 71 
70 6d 61 78 3d 36 39 20 71 70 73 74 65 70 3d 34 20 76 62 76 
5f 6d 61 78 72 61 74 65 3d 31 30 35 30 36 20 76 62 76 5f 62 
75 66 73 69 7a 65 3d 36 34 30 30 30 20 6e 61 6c 5f 68 72 64 
3d 6e 6f 6e 65 20 66 69 6c 6c 65 72 3d 30 20 69 70 5f 72 61 
74 69 6f 3d 31 2e 34 30 20 61 71 3d 31 3a 31 2e 30 30 0 80 
[rtplib][rtpPkt_Handler]Found a key frame at ts 4178129015

TS = 4178129015 | RTP Payload = 96 | SeqNr = 775 | Len = 203612
TS = 4178141015 | RTP Payload = 96 | SeqNr = 930 | Len = 201080
TS = 4178135015 | RTP Payload = 96 | SeqNr = 1021 | Len = 118373
TS = 4178132015 | RTP Payload = 96 | SeqNr = 1055 | Len = 44227
TS = 4178138015 | RTP Payload = 96 | SeqNr = 1102 | Len = 60864
TS = 4178153015 | RTP Payload = 96 | SeqNr = 1255 | Len = 198229
TS = 4178147015 | RTP Payload = 96 | SeqNr = 1350 | Len = 123610
TS = 4178144015 | RTP Payload = 96 | SeqNr = 1396 | Len = 59191
TS = 4178150015 | RTP Payload = 96 | SeqNr = 1442 | Len = 58868
TS = 4178165015 | RTP Payload = 96 | SeqNr = 1551 | Len = 141741
TS = 4178159015 | RTP Payload = 96 | SeqNr = 1614 | Len = 81817
TS = 4178156015 | RTP Payload = 96 | SeqNr = 1648 | Len = 43884
TS = 4178162015 | RTP Payload = 96 | SeqNr = 1681 | Len = 42230
TS = 4178177015 | RTP Payload = 96 | SeqNr = 1755 | Len = 95284
TS = 4178171015 | RTP Payload = 96 | SeqNr = 1792 | Len = 47881
TS = 4178168015 | RTP Payload = 96 | SeqNr = 1814 | Len = 28005
TS = 4178174015 | RTP Payload = 96 | SeqNr = 1834 | Len = 25660
TS = 4178189015 | RTP Payload = 96 | SeqNr = 1904 | Len = 90654
TS = 4178183015 | RTP Payload = 96 | SeqNr = 1939 | Len = 45065
TS = 4178180015 | RTP Payload = 96 | SeqNr = 1959 | Len = 25709
TS = 4178186015 | RTP Payload = 96 | SeqNr = 1978 | Len = 23450
TS = 4178201015 | RTP Payload = 96 | SeqNr = 2049 | Len = 91892
TS = 4178195015 | RTP Payload = 96 | SeqNr = 2084 | Len = 45078
TS = 4178192015 | RTP Payload = 96 | SeqNr = 2105 | Len = 26696
TS = 4178198015 | RTP Payload = 96 | SeqNr = 2124 | Len = 23850
TS = 4178213015 | RTP Payload = 96 | SeqNr = 2190 | Len = 85902
TS = 4178207015 | RTP Payload = 96 | SeqNr = 2224 | Len = 43719
TS = 4178204015 | RTP Payload = 96 | SeqNr = 2243 | Len = 24694
TS = 4178210015 | RTP Payload = 96 | SeqNr = 2262 | Len = 23765
TS = 4178225015 | RTP Payload = 96 | SeqNr = 2343 | Len = 104406
TS = 4178219015 | RTP Payload = 96 | SeqNr = 2392 | Len = 63009
TS = 4178216015 | RTP Payload = 96 | SeqNr = 2416 | Len = 31117
TS = 4178222015 | RTP Payload = 96 | SeqNr = 2434 | Len = 22376
TS = 4178237015 | RTP Payload = 96 | SeqNr = 2504 | Len = 90636
TS = 4178231015 | RTP Payload = 96 | SeqNr = 2538 | Len = 43938
TS = 4178228015 | RTP Payload = 96 | SeqNr = 2558 | Len = 25073
TS = 4178234015 | RTP Payload = 96 | SeqNr = 2577 | Len = 24516
TS = 4178249015 | RTP Payload = 96 | SeqNr = 2646 | Len = 88641
TS = 4178243015 | RTP Payload = 96 | SeqNr = 2681 | Len = 45242
TS = 4178240015 | RTP Payload = 96 | SeqNr = 2702 | Len = 26106
TS = 4178246015 | RTP Payload = 96 | SeqNr = 2721 | Len = 24228
TS = 4178261015 | RTP Payload = 96 | SeqNr = 2790 | Len = 89584
TS = 4178255015 | RTP Payload = 96 | SeqNr = 2826 | Len = 45774
TS = 4178252015 | RTP Payload = 96 | SeqNr = 2846 | Len = 25992
TS = 4178258015 | RTP Payload = 96 | SeqNr = 2865 | Len = 24716
TS = 4178273015 | RTP Payload = 96 | SeqNr = 2934 | Len = 89608
TS = 4178267015 | RTP Payload = 96 | SeqNr = 2971 | Len = 46979
TS = 4178264015 | RTP Payload = 96 | SeqNr = 2992 | Len = 27101
TS = 4178270015 | RTP Payload = 96 | SeqNr = 3012 | Len = 25055
TS = 4178285015 | RTP Payload = 96 | SeqNr = 3080 | Len = 87833
TS = 4178279015 | RTP Payload = 96 | SeqNr = 3116 | Len = 45751
TS = 4178276015 | RTP Payload = 96 | SeqNr = 3137 | Len = 26313
TS = 4178282015 | RTP Payload = 96 | SeqNr = 3156 | Len = 24665
TS = 4178291015 | RTP Payload = 96 | SeqNr = 3208 | Len = 66681
TS = 4178288015 | RTP Payload = 96 | SeqNr = 3229 | Len = 26074
TS = 4178303015 | RTP Payload = 96 | SeqNr = 3299 | Len = 90940
TS = 4178297015 | RTP Payload = 96 | SeqNr = 3337 | Len = 48731
TS = 4178294015 | RTP Payload = 96 | SeqNr = 3369 | Len = 41596
TS = 4178300015 | RTP Payload = 96 | SeqNr = 3390 | Len = 26159
TS = 4178315015 | RTP Payload = 96 | SeqNr = 3465 | Len = 96905
TS = 4178309015 | RTP Payload = 96 | SeqNr = 3511 | Len = 58885
TS = 4178306015 | RTP Payload = 96 | SeqNr = 3532 | Len = 26598
TS = 4178312015 | RTP Payload = 96 | SeqNr = 3550 | Len = 22520
TS = 4178327015 | RTP Payload = 96 | SeqNr = 3614 | Len = 82414
TS = 4178321015 | RTP Payload = 96 | SeqNr = 3648 | Len = 43939
TS = 4178318015 | RTP Payload = 96 | SeqNr = 3668 | Len = 25528
TS = 4178324015 | RTP Payload = 96 | SeqNr = 3686 | Len = 23091
TS = 4178339015 | RTP Payload = 96 | SeqNr = 3751 | Len = 84627
TS = 4178333015 | RTP Payload = 96 | SeqNr = 3785 | Len = 43869
TS = 4178330015 | RTP Payload = 96 | SeqNr = 3806 | Len = 26256
TS = 4178336015 | RTP Payload = 96 | SeqNr = 3825 | Len = 24184
TS = 4178351015 | RTP Payload = 96 | SeqNr = 3890 | Len = 83748
TS = 4178345015 | RTP Payload = 96 | SeqNr = 3924 | Len = 43836
TS = 4178342015 | RTP Payload = 96 | SeqNr = 3945 | Len = 26086
TS = 4178348015 | RTP Payload = 96 | SeqNr = 3963 | Len = 23001
TS = 4178363015 | RTP Payload = 96 | SeqNr = 4028 | Len = 84626
TS = 4178357015 | RTP Payload = 96 | SeqNr = 4063 | Len = 44595
TS = 4178354015 | RTP Payload = 96 | SeqNr = 4083 | Len = 25859
TS = 4178360015 | RTP Payload = 96 | SeqNr = 4101 | Len = 22622
TS = 4178375015 | RTP Payload = 96 | SeqNr = 4161 | Len = 78088
TS = 4178369015 | RTP Payload = 96 | SeqNr = 4195 | Len = 44047
TS = 4178366015 | RTP Payload = 96 | SeqNr = 4214 | Len = 24542
TS = 4178372015 | RTP Payload = 96 | SeqNr = 4232 | Len = 22894
TS = 4178381015 | RTP Payload = 96 | SeqNr = 4276 | Len = 56471
TS = 4178378015 | RTP Payload = 96 | SeqNr = 4295 | Len = 24404
TS = 4178384015 | RTP Payload = 96 | SeqNr = 4353 | Len = 75515
TS = 4178396015 | RTP Payload = 96 | SeqNr = 4415 | Len = 79455
TS = 4178390015 | RTP Payload = 96 | SeqNr = 4452 | Len = 47364
TS = 4178387015 | RTP Payload = 96 | SeqNr = 4474 | Len = 27695
TS = 4178393015 | RTP Payload = 96 | SeqNr = 4495 | Len = 27081
TS = 4178408015 | RTP Payload = 96 | SeqNr = 4569 | Len = 95325
TS = 4178402015 | RTP Payload = 96 | SeqNr = 4615 | Len = 59411
TS = 4178399015 | RTP Payload = 96 | SeqNr = 4647 | Len = 41437
TS = 4178405015 | RTP Payload = 96 | SeqNr = 4669 | Len = 28354
TS = 4178414015 | RTP Payload = 96 | SeqNr = 4720 | Len = 65840
TS = 4178411015 | RTP Payload = 96 | SeqNr = 4747 | Len = 34226
TS = 4178420015 | RTP Payload = 96 | SeqNr = 4802 | Len = 71528
TS = 4178417015 | RTP Payload = 96 | SeqNr = 4823 | Len = 26761
TS = 4178432015 | RTP Payload = 96 | SeqNr = 4888 | Len = 83339
TS = 4178426015 | RTP Payload = 96 | SeqNr = 4920 | Len = 40835
TS = 4178423015 | RTP Payload = 96 | SeqNr = 4939 | Len = 23688
TS = 4178429015 | RTP Payload = 96 | SeqNr = 4956 | Len = 21807
TS = 4178444015 | RTP Payload = 96 | SeqNr = 5022 | Len = 85391
TS = 4178438015 | RTP Payload = 96 | SeqNr = 5054 | Len = 41269
TS = 4178435015 | RTP Payload = 96 | SeqNr = 5073 | Len = 24672
TS = 4178441015 | RTP Payload = 96 | SeqNr = 5090 | Len = 21854
TS = 4178456015 | RTP Payload = 96 | SeqNr = 5154 | Len = 83320
TS = 4178450015 | RTP Payload = 96 | SeqNr = 5187 | Len = 42363
TS = 4178447015 | RTP Payload = 96 | SeqNr = 5206 | Len = 24737
TS = 4178453015 | RTP Payload = 96 | SeqNr = 5223 | Len = 22089
TS = 4178468015 | RTP Payload = 96 | SeqNr = 5282 | Len = 76070
TS = 4178462015 | RTP Payload = 96 | SeqNr = 5315 | Len = 42528
TS = 4178459015 | RTP Payload = 96 | SeqNr = 5334 | Len = 24044
TS = 4178465015 | RTP Payload = 96 | SeqNr = 5352 | Len = 23265
TS = 4178471015 | RTP Payload = 96 | SeqNr = 5412 | Len = 77301
TS = 4178483015 | RTP Payload = 96 | SeqNr = 5478 | Len = 85933
TS = 4178477015 | RTP Payload = 96 | SeqNr = 5515 | Len = 47230
TS = 4178474015 | RTP Payload = 96 | SeqNr = 5535 | Len = 25610
TS = 4178480015 | RTP Payload = 96 | SeqNr = 5552 | Len = 22000
TS = 4178495015 | RTP Payload = 96 | SeqNr = 5625 | Len = 94404
TS = 4178489015 | RTP Payload = 96 | SeqNr = 5675 | Len = 64617
TS = 4178486015 | RTP Payload = 96 | SeqNr = 5696 | Len = 26179
TS = 4178492015 | RTP Payload = 96 | SeqNr = 5714 | Len = 22167
TS = 4178507015 | RTP Payload = 96 | SeqNr = 5777 | Len = 80743
TS = 4178501015 | RTP Payload = 96 | SeqNr = 5812 | Len = 45236
TS = 4178498015 | RTP Payload = 96 | SeqNr = 5835 | Len = 28904
TS = 4178504015 | RTP Payload = 96 | SeqNr = 5854 | Len = 24198
TS = 4178513015 | RTP Payload = 96 | SeqNr = 5899 | Len = 57574
TS = 4178510015 | RTP Payload = 96 | SeqNr = 5919 | Len = 25511
TS = 4178516015 | RTP Payload = 96 | SeqNr = 5964 | Len = 58529
TS = 4178528015 | RTP Payload = 96 | SeqNr = 6019 | Len = 70689
TS = 4178522015 | RTP Payload = 96 | SeqNr = 6045 | Len = 33240
TS = 4178519015 | RTP Payload = 96 | SeqNr = 6060 | Len = 19501
TS = 4178525015 | RTP Payload = 96 | SeqNr = 6075 | Len = 19503
TS = 4178540015 | RTP Payload = 96 | SeqNr = 6135 | Len = 77926
TS = 4178534015 | RTP Payload = 96 | SeqNr = 6163 | Len = 35622
TS = 4178531015 | RTP Payload = 96 | SeqNr = 6181 | Len = 22316
TS = 4178537015 | RTP Payload = 96 | SeqNr = 6196 | Len = 19279
TS = 4178552015 | RTP Payload = 96 | SeqNr = 6257 | Len = 78483
TS = 4178546015 | RTP Payload = 96 | SeqNr = 6286 | Len = 37405
TS = 4178543015 | RTP Payload = 96 | SeqNr = 6303 | Len = 22036
TS = 4178549015 | RTP Payload = 96 | SeqNr = 6319 | Len = 19656
TS = 4178564015 | RTP Payload = 96 | SeqNr = 6379 | Len = 78060
TS = 4178558015 | RTP Payload = 96 | SeqNr = 6408 | Len = 37508
TS = 4178555015 | RTP Payload = 96 | SeqNr = 6426 | Len = 22218
TS = 4178561015 | RTP Payload = 96 | SeqNr = 6441 | Len = 18979
TS = 4178576015 | RTP Payload = 96 | SeqNr = 6500 | Len = 75989
TS = 4178570015 | RTP Payload = 96 | SeqNr = 6530 | Len = 38004
TS = 4178567015 | RTP Payload = 96 | SeqNr = 6547 | Len = 21787
TS = 4178573015 | RTP Payload = 96 | SeqNr = 6562 | Len = 18969
TS = 4178588015 | RTP Payload = 96 | SeqNr = 6627 | Len = 83366
TS = 4178582015 | RTP Payload = 96 | SeqNr = 6663 | Len = 46304
TS = 4178579015 | RTP Payload = 96 | SeqNr = 6684 | Len = 26835
TS = 4178585015 | RTP Payload = 96 | SeqNr = 6699 | Len = 19021
TS = 4178594015 | RTP Payload = 96 | SeqNr = 6752 | Len = 68186
TS = 4178591015 | RTP Payload = 96 | SeqNr = 6771 | Len = 24380
TS = 4178600015 | RTP Payload = 96 | SeqNr = 6831 | Len = 77136
TS = 4178597015 | RTP Payload = 96 | SeqNr = 6850 | Len = 24150
TS = 4178612015 | RTP Payload = 96 | SeqNr = 6922 | Len = 93448
TS = 4178606015 | RTP Payload = 96 | SeqNr = 6957 | Len = 44424
TS = 4178603015 | RTP Payload = 96 | SeqNr = 6978 | Len = 26159
TS = 4178609015 | RTP Payload = 96 | SeqNr = 6996 | Len = 22294
TS = 4178624015 | RTP Payload = 96 | SeqNr = 7068 | Len = 92843
TS = 4178618015 | RTP Payload = 96 | SeqNr = 7103 | Len = 44945
TS = 4178615015 | RTP Payload = 96 | SeqNr = 7123 | Len = 25716
TS = 4178621015 | RTP Payload = 96 | SeqNr = 7141 | Len = 23051
TS = 4178633015 | RTP Payload = 96 | SeqNr = 7202 | Len = 79105
TS = 4178627015 | RTP Payload = 96 | SeqNr = 7226 | Len = 31208
TS = 4178630015 | RTP Payload = 96 | SeqNr = 7245 | Len = 24539
TS = 4178645015 | RTP Payload = 96 | SeqNr = 7318 | Len = 94486
TS = 4178639015 | RTP Payload = 96 | SeqNr = 7354 | Len = 46353
TS = 4178636015 | RTP Payload = 96 | SeqNr = 7376 | Len = 27837
TS = 4178642015 | RTP Payload = 96 | SeqNr = 7391 | Len = 18464
TS = 4178657015 | RTP Payload = 96 | SeqNr = 7459 | Len = 87444
TS = 4178651015 | RTP Payload = 96 | SeqNr = 7492 | Len = 42915
TS = 4178648015 | RTP Payload = 96 | SeqNr = 7511 | Len = 24244
TS = 4178654015 | RTP Payload = 96 | SeqNr = 7529 | Len = 22765
TS = 4178669015 | RTP Payload = 96 | SeqNr = 7614 | Len = 109811
TS = 4178663015 | RTP Payload = 96 | SeqNr = 7654 | Len = 51149
TS = 4178660015 | RTP Payload = 96 | SeqNr = 7674 | Len = 25790
TS = 4178666015 | RTP Payload = 96 | SeqNr = 7698 | Len = 30557
TS = 4178681015 | RTP Payload = 96 | SeqNr = 7775 | Len = 100006
TS = 4178675015 | RTP Payload = 96 | SeqNr = 7818 | Len = 55775
TS = 4178672015 | RTP Payload = 96 | SeqNr = 7836 | Len = 22547
TS = 4178678015 | RTP Payload = 96 | SeqNr = 7861 | Len = 31820
TS = 4178687015 | RTP Payload = 96 | SeqNr = 7918 | Len = 74185
TS = 4178684015 | RTP Payload = 96 | SeqNr = 7939 | Len = 26901
TS = 4178696015 | RTP Payload = 96 | SeqNr = 8012 | Len = 94094
TS = 4178690015 | RTP Payload = 96 | SeqNr = 8043 | Len = 39379
TS = 4178693015 | RTP Payload = 96 | SeqNr = 8064 | Len = 26557
TS = 4178708015 | RTP Payload = 96 | SeqNr = 8149 | Len = 109681
TS = 4178702015 | RTP Payload = 96 | SeqNr = 8192 | Len = 54915
TS = 4178699015 | RTP Payload = 96 | SeqNr = 8216 | Len = 30514
TS = 4178705015 | RTP Payload = 96 | SeqNr = 8238 | Len = 27367
TS = 4178717015 | RTP Payload = 96 | SeqNr = 8308 | Len = 90131
TS = 4178711015 | RTP Payload = 96 | SeqNr = 8334 | Len = 32961
TS = 4178714015 | RTP Payload = 96 | SeqNr = 8355 | Len = 27081
TS = 4178729015 | RTP Payload = 96 | SeqNr = 8437 | Len = 106749
TS = 4178723015 | RTP Payload = 96 | SeqNr = 8478 | Len = 52274
TS = 4178720015 | RTP Payload = 96 | SeqNr = 8502 | Len = 30586
TS = 4178726015 | RTP Payload = 96 | SeqNr = 8524 | Len = 28276
TS = 4178738015 | RTP Payload = 96 | SeqNr = 8603 | Len = 101756
TS = 4178732015 | RTP Payload = 96 | SeqNr = 8632 | Len = 37331
TS = 4178735015 | RTP Payload = 96 | SeqNr = 8657 | Len = 31258
TS = 4178747015 | RTP Payload = 96 | SeqNr = 8736 | Len = 102742
TS = 4178741015 | RTP Payload = 96 | SeqNr = 8768 | Len = 41296
TS = 4178744015 | RTP Payload = 96 | SeqNr = 8794 | Len = 32827
TS = 4178750015 | RTP Payload = 96 | SeqNr = 8828 | Len = 43353
TS = 4178759015 | RTP Payload = 96 | SeqNr = 8932 | Len = 134339
TS = 4178753015 | RTP Payload = 96 | SeqNr = 8965 | Len = 42271
TS = 4178756015 | RTP Payload = 96 | SeqNr = 8992 | Len = 34494
TS = 4178771015 | RTP Payload = 96 | SeqNr = 9082 | Len = 117077
TS = 4178765015 | RTP Payload = 96 | SeqNr = 9132 | Len = 64136
TS = 4178762015 | RTP Payload = 96 | SeqNr = 9157 | Len = 31835
TS = 4178768015 | RTP Payload = 96 | SeqNr = 9183 | Len = 32990
TS = 4178774015 | RTP Payload = 96 | SeqNr = 9223 | Len = 51844
TS = 4178777015 | RTP Payload = 96 | SeqNr = 9263 | Len = 51143
TS = 4178789015 | RTP Payload = 96 | SeqNr = 9353 | Len = 116785
TS = 4178783015 | RTP Payload = 96 | SeqNr = 9405 | Len = 66992
TS = 4178780015 | RTP Payload = 96 | SeqNr = 9436 | Len = 39209
TS = 4178786015 | RTP Payload = 96 | SeqNr = 9462 | Len = 33617
TS = 4178801015 | RTP Payload = 96 | SeqNr = 9553 | Len = 117615
TS = 4178795015 | RTP Payload = 96 | SeqNr = 9605 | Len = 66893
TS = 4178792015 | RTP Payload = 96 | SeqNr = 9634 | Len = 37267
TS = 4178798015 | RTP Payload = 96 | SeqNr = 9662 | Len = 35443
TS = 4178813015 | RTP Payload = 96 | SeqNr = 9749 | Len = 112092
TS = 4178807015 | RTP Payload = 96 | SeqNr = 9797 | Len = 61440
TS = 4178804015 | RTP Payload = 96 | SeqNr = 9825 | Len = 36268
TS = 4178810015 | RTP Payload = 96 | SeqNr = 9853 | Len = 35378
TS = 4178825015 | RTP Payload = 96 | SeqNr = 9943 | Len = 116165
TS = 4178819015 | RTP Payload = 96 | SeqNr = 9994 | Len = 65623
TS = 4178816015 | RTP Payload = 96 | SeqNr = 10022 | Len = 36234
TS = 4178822015 | RTP Payload = 96 | SeqNr = 10051 | Len = 36878
TS = 4178837015 | RTP Payload = 96 | SeqNr = 10140 | Len = 115073
TS = 4178831015 | RTP Payload = 96 | SeqNr = 10192 | Len = 66763
TS = 4178828015 | RTP Payload = 96 | SeqNr = 10218 | Len = 33436
TS = 4178834015 | RTP Payload = 96 | SeqNr = 10244 | Len = 33796
TS = 4178849015 | RTP Payload = 96 | SeqNr = 10341 | Len = 125177
TS = 4178843015 | RTP Payload = 96 | SeqNr = 10401 | Len = 77900
TS = 4178840015 | RTP Payload = 96 | SeqNr = 10429 | Len = 35232
TS = 4178846015 | RTP Payload = 96 | SeqNr = 10459 | Len = 38179
TS = 4178858015 | RTP Payload = 96 | SeqNr = 10535 | Len = 98892
TS = 4178852015 | RTP Payload = 96 | SeqNr = 10563 | Len = 35531
TS = 4178855015 | RTP Payload = 96 | SeqNr = 10596 | Len = 41990
TS = 4178864015 | RTP Payload = 96 | SeqNr = 10665 | Len = 88820
TS = 4178861015 | RTP Payload = 96 | SeqNr = 10704 | Len = 49955
TS = 4178867015 | RTP Payload = 96 | SeqNr = 10762 | Len = 74508
TS = 4178870015 | RTP Payload = 96 | SeqNr = 10803 | Len = 52987
TS = 4178876015 | RTP Payload = 96 | SeqNr = 10860 | Len = 73161
TS = 4178873015 | RTP Payload = 96 | SeqNr = 10893 | Len = 42383
TS = 4178879015 | RTP Payload = 96 | SeqNr = 10894 | Len = 25
Payload Data : 
67 f4 0 20 91 9b 28 a 0 b7 42 0 0 3 0 2 0 0 3 0 
78 1e 30 63 2c 
TS = 4178879015 | RTP Payload = 96 | SeqNr = 10894 | Len = 5
Payload Data : 
68 eb ec 44 80 
TS = 4178879015 | RTP Payload = 96 | SeqNr = 11034 | Len = 182277

...
TS = 4179620015 | RTP Payload = 96 | SeqNr = 19953 | Len = 17574
TS = 4179626015 | RTP Payload = 96 | SeqNr = 19954 | Len = 25
Payload Data : 
67 f4 0 20 91 9b 28 a 0 b7 42 0 0 3 0 2 0 0 3 0 
78 1e 30 63 2c 
TS = 4179626015 | RTP Payload = 96 | SeqNr = 19954 | Len = 5
Payload Data : 
68 eb ec 44 80 
TS = 4179626015 | RTP Payload = 96 | SeqNr = 20034 | Len = 103235
TS = 4179638015 | RTP Payload = 96 | SeqNr = 20099 | Len = 83915
TS = 4179632015 | RTP Payload = 96 | SeqNr = 20136 | Len = 47878
...
TS = 4180367015 | RTP Payload = 96 | SeqNr = 28375 | Len = 74904
TS = 4180364015 | RTP Payload = 96 | SeqNr = 28397 | Len = 28493
TS = 4180373015 | RTP Payload = 96 | SeqNr = 28439 | Len = 54554
TS = 4180370015 | RTP Payload = 96 | SeqNr = 28459 | Len = 25420
TS = 4180376015 | RTP Payload = 96 | SeqNr = 28460 | Len = 25
Payload Data : 
67 f4 0 20 91 9b 28 a 0 b7 42 0 0 3 0 2 0 0 3 0 
78 1e 30 63 2c 
TS = 4180376015 | RTP Payload = 96 | SeqNr = 28460 | Len = 5
Payload Data : 
68 eb ec 44 80 
TS = 4180376015 | RTP Payload = 96 | SeqNr = 28560 | Len = 129431
TS = 4180388015 | RTP Payload = 96 | SeqNr = 28630 | Len = 90901
TS = 4180382015 | RTP Payload = 96 | SeqNr = 28675 | Len = 57964
TS = 4180379015 | RTP Payload = 96 | SeqNr = 28703 | Len = 35260
...
TS = 4183529015 | RTP Payload = 96 | SeqNr = 62224 | Len = 34771

Total Bytes Received = 79054651
Total Packets  = 1819


    


    After streaming starts I get 1 rtp packet len 25 , 1 rtp packet len 5 and 1 rtp packet len 760. After I received the packet with len 760 I get this message :

    


    [rtplib][rtpPkt_Handler]Found a key frame at ts 4178129015


    


    Can someone please explain to me what this rtp messages with len 25,5 and 760 means and what key frame means in this context ?

    


    Also I have rtp packets of size 5 and 25 in the middle of transmission.

    


    As you can see ffmpeg is saying 1802 frames were sent and Total packets received in C++ Application is 1819 because I receive 8 rtp packets of len 25, 8 rtp packets of len 5 and 1 rtp packet of size 760. If we substract this, it's exactly 1802 frames.

    


    My questions would be :

    


    How to get frame raw pixel data based on rtp packets payload data I receive ? eg. 1280x720 3 Channels ( thats the mp4 video resolution )

    


    Can someone tell me what those packets of len 25,5,760 on the beggining means and packets of len 25,5 in the middle of transmission means ?

    


    Thanks in advance !!!

    


  • Dash output with ffmpeg not producing durations specified with -seg_duration

    30 juillet 2022, par Codie

    There is a .mp4 file of 35 MB and 51 seconds. I have to create 51 chunks, each corresponding to 1 second with a size of less than 1MB (the total size should be almost the same as the original file). Please note that I have to implement lossless converting.

    


    I've tried many times, but it just produces about 10 files above 10 MB.

    


    


    Command :

    


    ffmpeg -re -i input.mp4 -map 0:v -c:v libx264 -crf 0 -bf 1 -keyint_min 120 -g 120 -sc_threshold 0 -b_strategy 0 -use_template 1 -seg_duration 1 -window_size 60 -adaptation_sets "id=0,streams=v id=1,streams=a" -f dash ./dashTest/out.mpd


    


    


    Command line log :

    


    ffmpeg version 5.1-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    creation_time   : 2022-07-27T09:13:31.000000Z
  Duration: 00:00:50.03, start: 0.000000, bitrate: 5716 kb/s
  Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 5396 kb/s, 25 fps, 25 tbr, 25k tbn (default)
    Metadata:
      creation_time   : 2022-07-27T09:13:31.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
    Metadata:
      creation_time   : 2022-07-27T09:13:31.000000Z
      handler_name    : #Mainconcept MP4 Sound Media Handler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 000001d13acb0380] using SAR=1/1
[libx264 @ 000001d13acb0380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 000001d13acb0380] profile High 4:4:4 Predictive, level 3.1, 4:2:0, 8-bit
[libx264 @ 000001d13acb0380] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=0 mixed_ref=1 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=2 keyint=120 keyint_min=61 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=0
[dash @ 000001d13a2a4680] No bit rate set for stream 0
[dash @ 000001d13a2a4680] Opening './dashTest/init-stream0.m4s' for writing
Output #0, dash, to './dashTest/out.mpd':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    encoder         : Lavf59.27.100
  Stream #0:0(eng): Video: h264, yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 12800 tbn (default)
    Metadata:
      creation_time   : 2022-07-27T09:13:31.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : Lavc59.37.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00001.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.849x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00002.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.918x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00003.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.942x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00004.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.957x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00005.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.964x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00006.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.971x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00007.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.975x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00008.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.978x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00009.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.981x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00010.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.982x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00011.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.983x
frame= 1250 fps= 25 q=-1.0 Lsize=N/A time=00:00:49.96 bitrate=N/A speed=0.992x
video:171641kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[libx264 @ 000001d13acb0380] frame I:11    Avg QP: 0.00  size:255122
[libx264 @ 000001d13acb0380] frame P:1239  Avg QP: 0.00  size:139591
[libx264 @ 000001d13acb0380] mb I  I16..4: 52.8%  8.8% 38.4%
[libx264 @ 000001d13acb0380] mb P  I16..4:  3.9%  0.7%  1.3%  P16..4: 28.0% 13.9% 11.3%  0.0%  0.0%    skip:40.8%
[libx264 @ 000001d13acb0380] 8x8 transform intra:11.9% inter:33.4%
[libx264 @ 000001d13acb0380] coded y,uvDC,uvAC intra: 68.6% 80.1% 78.9% inter: 38.0% 47.1% 46.5%
[libx264 @ 000001d13acb0380] i16 v,h,dc,p: 65% 28%  5%  2%
[libx264 @ 000001d13acb0380] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 33% 28%  2%  1%  1%  1%  1%  1%
[libx264 @ 000001d13acb0380] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 36%  7%  3%  5%  3%  4%  3%  2%
[libx264 @ 000001d13acb0380] i8c dc,h,v,p: 17% 38% 44%  1%
[libx264 @ 000001d13acb0380] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000001d13acb0380] ref P L0: 86.4%  7.6%  4.6%  1.4%
[libx264 @ 000001d13acb0380] kb/s:28121.58


    


    


    .mpd file :

    


    &lt;?xml version="1.0" encoding="utf-8"?>&#xA;<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT50.0S" maxsegmentduration="PT1.0S" minbuffertime="PT9.6S">&#xA;    <programinformation>&#xA;    </programinformation>&#xA;    <servicedescription>&#xA;    </servicedescription>&#xA;    <period start="PT0.0S">&#xA;        <adaptationset contenttype="video" startwithsap="1" segmentalignment="true" bitstreamswitching="true" framerate="25/1" maxwidth="1280" maxheight="720" par="16:9" lang="eng">&#xA;            <representation mimetype="video/mp4" codecs="avc1.f4001f" bandwidth="28122926" width="1280" height="720" sar="1:1">&#xA;                <segmenttemplate timescale="12800" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">&#xA;                    <segmenttimeline>&#xA;                        <s t="0" d="61440" r="9"></s>&#xA;                        <s d="25600"></s>&#xA;                    </segmenttimeline>&#xA;                </segmenttemplate>&#xA;            </representation>&#xA;        </adaptationset>&#xA;        <adaptationset contenttype="audio" startwithsap="1" segmentalignment="true" bitstreamswitching="true">&#xA;        </adaptationset>&#xA;    </period>&#xA;</mpd>&#xA;

    &#xA;

    &#xA;

    Please, if you want to put a negative point, mention your reason in the comments !

    &#xA;

    &#xA;

  • FFmpeg saturates memory + CPU usage drops to 0% during very basic conversion of PNG files to MP4 video

    7 août 2022, par mattze_frisch

    I have this Python function that runs ffmpeg with minimal options from the Windows command line :

    &#xA;

    def run_ffmpeg(frames_path, ffmpeg_path=notebook_directory):&#xA;    &#x27;&#x27;&#x27;&#xA;    This function runs ffmpeg.exe to convert PNG image files into a MP4 video.&#xA;    &#xA;    Parameters&#xA;    ----------&#xA;    frames_path : string&#xA;        Absolute path to the PNG files&#xA;    ffmpeg_path : string&#xA;        Absolute path to the FFmpeg executable (ffmpeg.exe)&#xA;    &#x27;&#x27;&#x27;&#xA;    &#xA;    from subprocess import check_call&#xA;    &#xA;    &#xA;    check_call(&#xA;        [&#xA;            os.path.join(ffmpeg_path, &#x27;ffmpeg&#x27;),&#xA;            &#x27;-y&#x27;,    # Overwrite output files without asking&#xA;            &#x27;-report&#x27;,    # Write logfile to current working directory&#xA;            &#x27;-framerate&#x27;, &#x27;60&#x27;,    # Input frame rate&#xA;            &#x27;-i&#x27;, os.path.join(frames_path, &#x27;frame%05d.png&#x27;),    # Path to input frames&#xA;            os.path.join(frames_path, &#x27;video.mp4&#x27;)    # Path to store output video&#xA;        ]&#xA;    )&#xA;

    &#xA;

    When running it from a Jupyter notebook over 2500 PNG files (RGBA, ca. 600-700 kB each, 9000 x 13934 pixels), CPU usage briefly peaks to 100% before dropping to 0%, while memory usage quickly saturates to 100% and stays there, slowing the system down almost to a freeze, so I need to terminate ffmpeg from the task manager :

    &#xA;

    Screenshot

    &#xA;

    The generated video file has a size of only 48 bytes and contains just a black frame when viewed in the VLC player.

    &#xA;

    This is the ffmpeg log output :

    &#xA;

    ffmpeg started on 2022-08-05 at 17:17:55&#xA;Report written to "ffmpeg-20220805-171755.log"&#xA;Log level: 48&#xA;Command line:&#xA;"C:\\Users\\Username\\Desktop\\folder\\ffmpeg" -y -report -framerate 60 -i "C:\\Users\\Username\\Desktop\\e\\frame%05d.png" "C:\\Users\\Username\\Desktop\\e\\video.mp4"&#xA;ffmpeg version 2022-07-14-git-882aac99d2-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers&#xA;  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)&#xA;  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo --ena  libavutil      57. 29.100 / 57. 29.100&#xA;  libavcodec     59. 38.100 / 59. 38.100&#xA;  libavformat    59. 28.100 / 59. 28.100&#xA;  libavdevice    59.  8.100 / 59.  8.100&#xA;  libavfilter     8. 45.100 /  8. 45.100&#xA;  libswscale      6.  8.100 /  6.  8.100&#xA;  libswresample   4.  8.100 /  4.  8.100&#xA;  libpostproc    56.  7.100 / 56.  7.100&#xA;Splitting the commandline.&#xA;Reading option &#x27;-y&#x27; ... matched as option &#x27;y&#x27; (overwrite output files) with argument &#x27;1&#x27;.&#xA;Reading option &#x27;-report&#x27; ... matched as option &#x27;report&#x27; (generate a report) with argument &#x27;1&#x27;.&#xA;Reading option &#x27;-framerate&#x27; ... matched as AVOption &#x27;framerate&#x27; with argument &#x27;60&#x27;.&#xA;Reading option &#x27;-i&#x27; ... matched as input url with argument &#x27;C:\Users\Username\Desktop\e\frame%05d.png&#x27;.&#xA;Reading option &#x27;C:\Users\Username\Desktop\e\video.mp4&#x27; ... matched as output url.&#xA;Finished splitting the commandline.&#xA;Parsing a group of options: global .&#xA;Applying option y (overwrite output files) with argument 1.&#xA;Applying option report (generate a report) with argument 1.&#xA;Successfully parsed a group of options.&#xA;Parsing a group of options: input url C:\Users\Username\Desktop\e\frame%05d.png.&#xA;Successfully parsed a group of options.&#xA;Opening an input file: C:\Users\Username\Desktop\e\frame%05d.png.&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00000.png&#x27; for reading&#xA;[file @ 0000000000425680] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000042d800] Statistics: 668318 bytes read, 0 seeks&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00001.png&#x27; for reading&#xA;[file @ 000000000042dac0] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000042d6c0] Statistics: 668371 bytes read, 0 seeks&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00002.png&#x27; for reading&#xA;[file @ 000000000042d6c0] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000042dac0] Statistics: 669177 bytes read, 0 seeks&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00003.png&#x27; for reading&#xA;[file @ 000000000042dac0] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 0000000000437a40] Statistics: 684594 bytes read, 0 seeks&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00004.png&#x27; for reading&#xA;[file @ 0000000000437a40] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 0000000000437c00] Statistics: 703014 bytes read, 0 seeks&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00005.png&#x27; for reading&#xA;[file @ 0000000000437c00] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 0000000000437d00] Statistics: 721604 bytes read, 0 seeks&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00006.png&#x27; for reading&#xA;[file @ 0000000000437cc0] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 0000000000437f40] Statistics: 739761 bytes read, 0 seeks&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00007.png&#x27; for reading&#xA;[file @ 0000000000437f40] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 0000000000438040] Statistics: 757327 bytes read, 0 seeks&#xA;[image2 @ 000000000041ff80] Probe buffer size limit of 5000000 bytes reached&#xA;Input #0, image2, from &#x27;C:\Users\Username\Desktop\e\frame%05d.png&#x27;:&#xA;  Duration: 00:00:41.67, start: 0.000000, bitrate: N/A&#xA;  Stream #0:0, 8, 1/60: Video: png, rgba(pc), 9000x13934 [SAR 29528:29528 DAR 4500:6967], 60 fps, 60 tbr, 60 tbn&#xA;Successfully opened the file.&#xA;Parsing a group of options: output url C:\Users\Username\Desktop\e\video.mp4.&#xA;Successfully parsed a group of options.&#xA;Opening an output file: C:\Users\Username\Desktop\e\video.mp4.&#xA;[file @ 000000002081e3c0] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;Successfully opened the file.&#xA;detected 12 logical cores&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))&#xA;Press [q] to stop, [?] for help&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00008.png&#x27; for reading&#xA;[file @ 00000000024ad980] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 00000000004379c0] Statistics: 767857 bytes read, 0 seeks&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00009.png&#x27; for reading&#xA;[file @ 000000000042d600] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 00000000004379c0] Statistics: 774848 bytes read, 0 seeks&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00010.png&#x27; for reading&#xA;[file @ 00000000004379c0] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000042da00] Statistics: 787178 bytes read, 0 seeks&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00011.png&#x27; for reading&#xA;[file @ 00000000004379c0] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000042da00] Statistics: 797084 bytes read, 0 seeks&#xA;cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00012.png&#x27; for reading&#xA;[file @ 0000000000437a80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000042da00] Statistics: 802870 bytes read, 0 seeks&#xA;[graph 0 input from stream 0:0 @ 00000000208bf800] Setting &#x27;video_size&#x27; to value &#x27;9000x13934&#x27;&#xA;[graph 0 input from stream 0:0 @ 00000000208bf800] Setting &#x27;pix_fmt&#x27; to value &#x27;26&#x27;&#xA;[graph 0 input from stream 0:0 @ 00000000208bf800] Setting &#x27;time_base&#x27; to value &#x27;1/60&#x27;&#xA;[graph 0 input from stream 0:0 @ 00000000208bf800] Setting &#x27;pixel_aspect&#x27; to value &#x27;29528/29528&#x27;&#xA;[graph 0 input from stream 0:0 @ 00000000208bf800] Setting &#x27;frame_rate&#x27; to value &#x27;60/1&#x27;&#xA;[graph 0 input from stream 0:0 @ 00000000208bf800] w:9000 h:13934 pixfmt:rgba tb:1/60 fr:60/1 sar:29528/29528&#xA;[format @ 00000000025ef840] Setting &#x27;pix_fmts&#x27; to value &#x27;yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16|nv21|yuv420p10le|yuv422p10le|yuv444p10le|nv20le|gray|gray10le&#x27;&#xA;[auto_scale_0 @ 00000000025efe40] w:iw h:ih flags:&#x27;&#x27; interl:0&#xA;[format @ 00000000025ef840] auto-inserting filter &#x27;auto_scale_0&#x27; between the filter &#x27;Parsed_null_0&#x27; and the filter &#x27;format&#x27;&#xA;[AVFilterGraph @ 000000000042da00] query_formats: 4 queried, 3 merged, 1 already done, 0 delayed&#xA;[auto_scale_0 @ 00000000025efe40] picking yuv444p out of 13 ref:rgba alpha:1&#xA;[auto_scale_0 @ 00000000025efe40] w:9000 h:13934 fmt:rgba sar:29528/29528 -> w:9000 h:13934 fmt:yuv444p sar:1/1 flags:0x0&#xA;[auto_scale_0 @ 00000000025efe40] w:9000 h:13934 fmt:rgba sar:29528/29528 -> w:9000 h:13934 fmt:yuv444p sar:1/1 flags:0x0&#xA;[auto_scale_0 @ 00000000025efe40] w:9000 h:13934 fmt:rgba sar:29528/29528 -> w:9000 h:13934 fmt:yuv444p sar:1/1 flags:0x0&#xA;[auto_scale_0 @ 00000000025efe40] w:9000 h:13934 fmt:rgba sar:29528/29528 -> w:9000 h:13934 fmt:yuv444p sar:1/1 flags:0x0&#xA;[libx264 @ 000000002081d280] using mv_range_thread = 376&#xA;[libx264 @ 000000002081d280] using SAR=1/1&#xA;[libx264 @ 000000002081d280] frame MB size (563x871) > level limit (139264)&#xA;[libx264 @ 000000002081d280] DPB size (4 frames, 1961492 mbs) > level limit (1 frames, 696320 mbs)&#xA;[libx264 @ 000000002081d280] MB rate (29422380) > level limit (16711680)&#xA;[libx264 @ 000000002081d280] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX&#xA;[libx264 @ 000000002081d280] profile High 4:4:4 Predictive, level 6.2, 4:4:4, 8-bit&#xA;[libx264 @ 000000002081d280] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00&#xA;Output #0, mp4, to &#x27;C:\Users\Username\Desktop\e\video.mp4&#x27;:&#xA;  Metadata:&#xA;    encoder         : Lavf59.28.100&#xA;  Stream #0:0, 0, 1/15360: Video: h264 (avc1 / 0x31637661), yuv444p(tv, progressive), 9000x13934 [SAR 1:1 DAR 4500:6967], q=2-31, 60 fps, 15360 tbn&#xA;    Metadata:&#xA;      encoder         : Lavc59.38.100 libx264&#xA;    Side data:&#xA;      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A&#xA;Clipping frame in rate conversion by 0.000008&#xA;frame=    1 fps=0.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00013.png&#x27; for reading&#xA;[file @ 000000000a6a2180] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 810395 bytes read, 0 seeks&#xA;frame=    2 fps=0.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00014.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 818213 bytes read, 0 seeks&#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00015.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 817936 bytes read, 0 seeks&#xA;frame=    4 fps=1.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00016.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 817014 bytes read, 0 seeks&#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00017.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 828088 bytes read, 0 seeks&#xA;frame=    6 fps=1.5 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00018.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 831007 bytes read, 0 seeks&#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00019.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 845203 bytes read, 0 seeks&#xA;frame=    8 fps=1.7 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00020.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 851548 bytes read, 0 seeks&#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00021.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 847629 bytes read, 0 seeks&#xA;frame=   10 fps=1.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00022.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 860169 bytes read, 0 seeks&#xA;frame=   11 fps=1.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00023.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 857243 bytes read, 0 seeks&#xA;frame=   12 fps=1.2 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)&#xA;[image2 @ 000000000041ff80] Opening &#x27;C:\Users\Username\Desktop\e\frame00024.png&#x27; for reading&#xA;[file @ 000000001ec86c80] Setting default whitelist &#x27;file,crypto,data&#x27;&#xA;[AVIOContext @ 000000000b38de80] Statistics: 835155 bytes read, 0 seeks&#xA;

    &#xA;

    What is the problem ?

    &#xA;

    By the way, the color model of the image files was confirmed by doing

    &#xA;

    from PIL import Image&#xA;&#xA;&#xA;img = Image.open(&#x27;C:\\Users\\EPI-SMLM\\Desktop\\e\\frame00000.png&#x27;)&#xA;img.mode&#xA;-------------------------------------------------------------------&#xA;C:\Program Files\Python38\lib\site-packages\PIL\Image.py:3035: DecompressionBombWarning: Image size (125406000 pixels) exceeds limit of 89478485 pixels, could be decompression bomb DOS attack.&#xA;  warnings.warn(&#xA;&#xA;&#x27;RGBA&#x27;&#xA;

    &#xA;

    The "decompression bomb warning" appears to be a false alarm/bug.

    &#xA;

    UPDATE : I can confirm that this happens even when there are only 50 image files, i.e. 50 x 700 kB = 35 MB in total size. ffmpeg still gobbles up all available memory (almost 60 GB of private bytes !!!).

    &#xA;

    And it also happens if ffmpeg is run from the command line.

    &#xA;

    This must be a bug !

    &#xA;

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