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• ffmpeg not setting GOP size for x264

  5 juillet 2012, par Chris Robinson

  Can someone please explain to me why the following settings :

  ffmpeg -i test.avi -vcodec libx264 -g 2 -keyint_min 1 -sc_threshold 100000000 -bf 1 test.mp4

  produces the following output :

  ffmpeg version N-41668-g564bb24 Copyright (c) 2000-2012 the FFmpeg developers
  
  built on Jun 17 2012 20:18:05 with gcc 4.6.3
  
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --ena  libavutil      51. 58.100 / 51. 58.100
  
    libavcodec     54. 25.100 / 54. 25.100
  
    libavformat    54.  6.101 / 54.  6.101
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 81.100 /  2. 81.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, avi, from 'test.avi':
  
    Metadata:
  
      encoder         : Lavf54.6.101
  
    Duration: 00:00:01.70, start: 0.000000, bitrate: 4258 kb/s
  
  Stream #0:0: Video: mpeg4 (Simple Profile) (DIVX / 0x58564944), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 30k tbc
  
  Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16, 128 kb/s
  
  [buffer @ 0000000004115600] w:1280 h:720 pixfmt:yuv420p tb:1001/30000 fr:30000/1001 sar:1/1 sws_param:flags=2
  
  [ffmpeg_buffersink @ 00000000041157a0] No opaque field provided
  
  [libx264 @ 000000000411f120] using SAR=1/1
  
  [libx264 @ 000000000411f120] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
  
  [libx264 @ 000000000411f120] profile High, level 3.1
  
  [libx264 @ 000000000411f120] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=-2 threads=36 lookahead_threads=6 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 keOutput #0, mp4, to 'test.mp4':
  
    Metadata:
  
      encoder         : Lavf54.6.101
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30k tbn, 29.97 tbc
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 -> libx264)
  
    Stream #0:1 -> #0:1 (mp3 -> libvo_aacenc)
  
  Press [q] to stop, [?] for help
  
  [libvo_aacenc @ 0000000001ebe240] Que input is backward in time
  
  Last message repeated 8 times
  
  frame=   35 fps=0.0 q=-1.0 Lsize=     466kB time=00:00:01.10 bitrate=3466.6kbits/s dup=1 drop=0    
  
  
  
  video:436kB audio:28kB global headers:0kB muxing overhead 0.558509%
  
  [libx264 @ 000000000411f120] frame I:1     Avg QP:24.93  size: 92398
  
  [libx264 @ 000000000411f120] frame P:28    Avg QP:26.82  size: 12010
  
  [libx264 @ 000000000411f120] frame B:6     Avg QP:30.37  size:  2764
  
  [libx264 @ 000000000411f120] consecutive B-frames: 74.3%  5.7%  8.6% 11.4%
  
  [libx264 @ 000000000411f120] mb I  I16..4: 41.5% 40.1% 18.4%
  
  [libx264 @ 000000000411f120] mb P  I16..4:  3.9%  1.4%  0.6%  P16..4: 14.3%  4.7%  3.2%  0.0%  0.0%    skip:72.0%
  
  [libx264 @ 000000000411f120] mb B  I16..4:  1.1%  0.4%  0.1%  B16..8: 14.2%  2.8%  0.6%  direct: 1.1%  skip:79.8%  L0:49.8% L1:39.5% BI:10.8%
  
  [libx264 @ 000000000411f120] 8x8 transform intra:29.9% inter:76.4%
  
  [libx264 @ 000000000411f120] coded y,uvDC,uvAC intra: 31.1% 34.4% 18.7% inter: 10.2% 6.3% 3.0%
  
  [libx264 @ 000000000411f120] i16 v,h,dc,p: 62% 34%  3%  0%
  
  [libx264 @ 000000000411f120] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 23% 38%  4%  4%  3%  3%  2%  5%
  
  [libx264 @ 000000000411f120] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 40% 35% 16%  1%  2%  2%  1%  1%  1%
  
  [libx264 @ 000000000411f120] i8c dc,h,v,p: 52% 20% 24%  3%
  
  [libx264 @ 000000000411f120] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 000000000411f120] ref P L0: 70.5% 10.1% 12.1%  7.3%
  
  [libx264 @ 000000000411f120] ref B L0: 81.1% 16.9%  2.0%
  
  [libx264 @ 000000000411f120] ref B L1: 89.7% 10.3%
  
  [libx264 @ 000000000411f120] kb/s:3050.18

  Why am I not getting an I-Frame every second frame ? Is there something else I can set to do enforce this ? If not, can you suggest how to do this using the mpeg4 codec. It's vital that I can extract what type of frame has been encoded during the encoding process and that I can set a specific GOP structure.

• avconv : Saving MP4 is Taking Hours

  4 septembre 2015, par PeregrineStudios

  not entirely sure if I should post this on askubuntu or stackoverflow. Posted on askubuntu and not getting any answers. I’m hoping I can find an answer here.

  I’m setting up a website where users can upload videos and share them. I’m using avconv to reduce the video size and save it twice, once as an mp4 and again as a webm.

  Uploading a .MOV from a phone, the video conversion is quick and manageable.

  Uploading a .mp4 from a Samsung Galaxy S3, the video conversion to webm is also quick. But, the conversion to another mp4 takes FOREVER - literally hours. Why ? Is anyone able to shed light on the problem ?

  My avconv output is below.

  avconv -i /var/www/dev_jackpine/ottawa2017/temp_videos/37a949071acaee714dae829ca8df9b29.mp4 -c:v libx264 -vf transpose=1,transpose=1,transpose=1 -s 640x480 /var/www/dev_jackpine/ottawa2017/spinnies/test.mp4
  
  avconv version 0.8.17-4:0.8.17-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers
  
  built on Mar 16 2015 13:26:50 with gcc 4.6.3
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/dev_jackpine/ottawa2017/temp_videos/37a949071acaee714dae829ca8df9b29.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 0
  
      compatible_brands: isom3gp4
  
      creation_time   : 2015-09-04 15:08:21
  
  Duration: 00:00:07.76, start: 0.000000, bitrate: 11756 kb/s
  
  Stream #0.0(eng): Video: h264 (Constrained Baseline), yuv420p, 1280x720, 11967 kb/s, 29.81 fps, 90k tbr, 90k tbn, 180k tbc
  
  Metadata:
  
    creation_time   : 2015-09-04 15:08:21
  
  Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 119 kb/s
  
  Metadata:
  
    creation_time   : 2015-09-04 15:08:21
  
  File '/var/www/dev_jackpine/ottawa2017/spinnies/test.mp4' already exists. Overwrite ? [y/N] y
  
  [buffer @ 0xc3d580] w:1280 h:720 pixfmt:yuv420p
  
  [scale @ 0xc3dac0] w:1280 h:720 fmt:yuv420p -> w:640 h:480 fmt:yuv420p flags:0x4
  
  [transpose @ 0xc3e280] w:640 h:480 dir:1 -> w:480 h:640 rotation:clockwise vflip:0
  
  [transpose @ 0xc3e7c0] w:480 h:640 dir:1 -> w:640 h:480 rotation:clockwise vflip:0
  
  [transpose @ 0xc3ede0] w:640 h:480 dir:1 -> w:480 h:640 rotation:clockwise vflip:0
  
  [libx264 @ 0xc2b100] MB rate (108000000) > level limit (983040)
  
  [libx264 @ 0xc2b100] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0xc2b100] profile Main, level 5.1
  
  [libx264 @ 0xc2b100] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 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=1.25 aq=1:1.00
  
  Output #0, mp4, to '/var/www/dev_jackpine/ottawa2017/spinnies/test.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 0
  
      compatible_brands: isom3gp4
  
      creation_time   : 2015-09-04 15:08:21
  
      encoder         : Lavf53.21.1
  
      Stream #0.0(eng): Video: libx264, yuv420p, 480x640, q=-1--1, 180k tbn, 90k tbc
  
      Metadata:
  
        creation_time   : 2015-09-04 15:08:21
  
      Stream #0.1(eng): Audio: libvo_aacenc, 48000 Hz, stereo, s16, 200 kb/s
  
      Metadata:
  
        creation_time   : 2015-09-04 15:08:21
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
  
  Press ctrl-c to stop encoding

  Here’s an example frame output :

  frame=124398 fps=142 q=33.0 size=   16885kB time=1.38 bitrate=100110.2kbits/s dup=124356 drop=0

  I’ve had the process running the whole time I’ve been writing this question, and so far it’s done... 22 frames.

  What could be the problem ?

• Burn subtitles Ffmpeg Segmantation Fault error

  5 septembre 2012, par Batuhan Topbaş

  I have vps and ffmpeg latest version. I wanna burn subtitles on videos then i use this input

  ffmpeg -i ohd.avi -report -acodec copy -strict -2 -vcodec libx264 -acodec aac -sameq -vf ass=ohd.ass outputass.mp4

  But this is give me error. Segmantation Fault. See in output..

      ffmpeg started on 2012-09-05 at 10:30:37
  
  Report written to "ffmpeg-20120905-103037.log"
  
  ffmpeg version N-44073-g54ca7e3 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Aug 31 2012 16:15:40 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-52)
  
    configuration: --enable-libfreetype --enable-libx264 --enable-gpl --enable-libfaac --enable-libass --enable-nonfree
  
    libavutil      51. 70.100 / 51. 70.100
  
    libavcodec     54. 55.100 / 54. 55.100
  
    libavformat    54. 25.104 / 54. 25.104
  
    libavdevice    54.  2.100 / 54.  2.100
  
    libavfilter     3. 15.101 /  3. 15.101
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, avi, from 'ohd.avi':
  
    Metadata:
  
      encoder         : Lavf54.25.104
  
    Duration: 00:01:00.22, start: 0.000000, bitrate: 4538 kb/s
  
      Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 23.98 tbn, 47.95 tbc
  
      Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 44100 Hz, stereo, s16, 192 kb/s
  
  File 'outputass.mp4' already exists. Overwrite ? [y/N] y
  
  FreeType library version: 2.2.1
  
  [Parsed_ass_0 @ 0xa6b4b00] FreeType headers version: 2.2.1
  
  [Parsed_ass_0 @ 0xa6b4b00] Init
  
  [Parsed_ass_0 @ 0xa6b4b00] File size: 622
  
  [Parsed_ass_0 @ 0xa6b4b00] [0xa6b7420] Style: Default,FreeSerif,24,&H00FFFFFF,&H00FFFFFF,&H00FFFFFF,&H00C0C0C0,-1,0,0,0,100,100,0,0.00,1,2,3,2,20,20,20,1
  
  [Parsed_ass_0 @ 0xa6b4b00] Added subtitle file: 'ohd.ass' (1 styles, 1 events)
  
  [Parsed_ass_0 @ 0xa6b4b00] Fontconfig disabled, only default font will be used.
  
  [graph 0 input from stream 0:0 @ 0xa6cd900] w:1280 h:720 pixfmt:yuv420p tb:1001/24000 fr:24000/1001 sar:1/1 sws_param:flags=2
  
  [graph 1 input from stream 0:1 @ 0xa6b0ae0] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
  
  [audio format for output stream 0:1 @ 0xa6b0c60] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:1'
  
  [auto-inserted resampler 0 @ 0xa6b17c0] chl:stereo fmt:s16 r:44100Hz -> chl:stereo fmt:flt r:44100Hz
  
  [libx264 @ 0xa6bfa20] using SAR=1/1
  
  [libx264 @ 0xa6bfa20] using cpu capabilities: MMX2 SSE2Fast FastShuffle SSEMisalign LZCNT
  
  [libx264 @ 0xa6bfa20] profile High, level 3.1
  
  [libx264 @ 0xa6bfa20] 264 - core 125 r2208 d9d2288 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=-2 threads=12 lookahead_threads=2 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=23 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
  
  Output #0, mp4, to 'outputass.mp4':
  
    Metadata:
  
      encoder         : Lavf54.25.104
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 24k tbn, 23.98 tbc
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, flt, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (ac3 -> aac)
  
  Press [q] to stop, [?] for help
  
  Segmentation fault

  What is wrong my input code ? i can't find because i am amateur.