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• Stream webcam using ffmpeg/avconv to RTMP libx264 doesn't work

  15 mars 2016, par Erez Posner

  i have been trying to stream my webcam to Ustream using RTMP.

  using the standard command works great :

  "avconv -f video4linux2 -r 25 -s 320x240 -i /dev/video0 -f flv rtmp ://host/pass"

  but i encoutner a 15 seconds latency !
  therefore i decided to compress the video using libx264.
  i downloaded it and confirmed it is installed properly.
  but when running this command :

  "avconv -f video4linux2 -r 25 -s 320x240 -i /dev/video0 -c:v libx264 -pix_fmt yuv420p-f flv rtmp ://host/pass"

  on ffmpeg i get "Illegal instruction"
  and under avconv it starts to stream but nothing is shown in Ustream channel.

  output from avconv command

  avconv version 9.14-6:9.14-1rpi1rpi1, Copyright (c) 2000-2014 the
  
  Libav developers
  
  built on Jul 22 2014 15:08:12 with gcc 4.6 (Debian 4.6.3-14+rpi1)
  
  [video4linux2 @ 0x709740] The driver changed the time per frame from 1/5 to 1/30
  
      [video4linux2 @ 0x709740] Estimating duration from bitrate, this may
  
      be inaccurate
  
      Input #0, video4linux2, from '/dev/video0':
  
        Duration: N/A, start: 5069.991764, bitrate: 36864 kb/s
  
          Stream #0.0: Video: rawvideo, yuyv422, 320x240, 36864 kb/s, 1000k    tbn, 30 tbc
  
      [libx264 @ 0x70a9e0] using cpu capabilities: none!
  
      [libx264 @ 0x70a9e0] profile High, level 1.2
  
      [libx264 @ 0x70a9e0] 264 - core 130 r2282 1db4621 - H.264/MPEG-4 AVC
  
      codec - Copyleft 2003-2013 - 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=1 lookahead_threads=1 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=5 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, flv, to
  
      'rtmp:host/pass:
  
        Metadata:
  
          encoder         : Lavf54.20.4
  
          Stream #0.0: Video: libx264, yuv420p, 320x240, q=-1--1, 1k tbn, 5 tbc
  
      Stream mapping:
  
        Stream #0:0 -> #0:0 (rawvideo -> libx264)
  
      Press ctrl-c to stop encoding
  
      frame=   44 fps=  3 q=23.0 size=      26kB time=0.20
  
      bitrate=1071.8kbits/s    bits/s

  what could be the problem ?
  thank you in advanced

• Stream from MP4 file over RTSP with ffserver

  25 octobre 2019, par sirlion

  I’m trying to stream a mp4 file over RTSP using ffserver with no luck so far. I just want to stream directly from the file, without feeding from ffmpeg (no transcoding involved). But I’ve made it work with mpg video.

  Here is my ffserver config file :

  Port 8090
  
  BindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 500000
  
  CustomLog -
  
  NoDaemon
  
  
  
  RTSPPort 7654
  
  RTSPBindAddress 0.0.0.0
  
  
  
  <stream>
  
      Format rtp
  
      File "/home/g/video_streaming/sample3-mpeg2.mpg"
  
  </stream>
  
  <stream>
  
      Format rtp
  
      File "/home/g/video.mp4"
  
  </stream>

  When I launch ffserver, everything seems fine based on the log output :

  $ ./dev/ffmpeg/ffserver -f ffserver-sample.conf
  
  ffserver version N-45673-gd0c27e8 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Oct 18 2012 10:36:52 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration:
  
    libavutil      51. 76.100 / 51. 76.100
  
    libavcodec     54. 66.100 / 54. 66.100
  
    libavformat    54. 33.100 / 54. 33.100
  
    libavdevice    54.  3.100 / 54.  3.100
  
    libavfilter     3. 19.103 /  3. 19.103
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 16.100 /  0. 16.100
  
  Thu Oct 18 11:54:22 2012 Opening file '/home/g/video.mp4'
  
  Thu Oct 18 11:54:22 2012 Opening file '/home/g/video.mp4'
  
  Thu Oct 18 11:54:23 2012 Opening file '/home/g/video_streaming/sample3-mpeg2.mpg'
  
  Thu Oct 18 11:54:23 2012 [mpeg @ 0x1dae3c0]max_analyze_duration 5000000 reached at 5005000
  
  Thu Oct 18 11:54:23 2012 Opening file '/home/g/video_streaming/sample3-mpeg2.mpg'
  
  Thu Oct 18 11:54:23 2012 [mpeg @ 0x1dae3c0]max_analyze_duration 5000000 reached at 5005000
  
  Thu Oct 18 11:54:23 2012 FFserver started.

  Finally, if I run ffplay in order to test the server, everything works fine for the mpg file, but not for the mp4 :

  $ ffplay rtsp://192.168.1.99:7654/test2-rtsp
  
  ffplay version N-45656-g916352f Copyright (c) 2003-2012 the FFmpeg developers
  
    built on Oct 17 2012 16:14:14 with gcc 4.4.5 (Ubuntu/Linaro 4.4.4-14ubuntu5.1)
  
    configuration:
  
    libavutil      51. 76.100 / 51. 76.100
  
    libavcodec     54. 66.100 / 54. 66.100
  
    libavformat    54. 33.100 / 54. 33.100
  
    libavdevice    54.  3.100 / 54.  3.100
  
    libavfilter     3. 19.103 /  3. 19.103
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 16.100 /  0. 16.100
  
  rtsp://192.168.1.99:7654/test2-rtsp: Invalid data found when processing input
  
  
  
  Server's output:
  
  
  
  Thu Oct 18 11:57:51 2012 FFserver started.
  
  Thu Oct 18 11:58:01 2012 192.168.1.101 - - [DESCRIBE] "rtsp://192.168.1.99:7654/test2-rtsp RTSP/1.0" 200 167
  
  Segmentation fault (core dumped)

  I don’t really know what I could be missing. I’ve just read in the official doc that streaming from a file is kind of broken. Since I don’t really know if that’s up to date, I decided to give it a try here.

  Any help or suggestions ? Alternatives ?

• ffmpeg filter complex maybe too long from my script

  8 novembre 2023, par iceget

  i am using ffmepg and filter complex to blend 2 png files for a exact time.
if i use a too long time (short commands working) then the output file has only 1kb and is not openable.

  


  i have added here my code was is not working, can anybody helps me ?

  


  i getting this back

  


  code :

  


  ffmpeg -loop 1 -t 0.2225 -i /tmp/a.png -loop 1 -t 0.2225 -i /tmp/b.png -s 640x480 -to 256 -c:v libx264 -pix_fmt yuv420p -filter_complex " \
[1:v][0:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b1v]; \
[0:v][1:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b2v]; \
[1:v][0:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b3v]; \
[0:v][1:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b4v]; \
[1:v][0:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b5v]; \
[0:v][1:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b6v]; \
[1:v][0:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b7v]; \
[0:v][1:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b8v]; \
[1:v][0:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b9v]; \
[0:v][1:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b10v]; \
[1:v][0:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b11v]; \
[0:v][1:v]blend=all_expr='A*(if(gte(T,0.2225),1,T/0.2225))+B*(1-(if(gte(T,0.2225),1,T/0.2225)))'[b12v]; \
...
[1:v][b988v][0:v][b989v][1:v][b990v][0:v][b991v][1:v][b992v][0:v][b993v][1:v][b994v][0:v][b995v][1:v][b996v][0:v][b997v][1:v][b998v][0:v][b999v][1:v][b1000v][0:v][b1001v][1:v][b1002v][0:v][b1003v][1:v][b1004v][0:v][b1005v][1:v][b1006v][0:v][b1007v][1:v][b1008v][0:v][b1009v][1:v][b1010v][0:v][b1011v][1:v][b1012v][0:v][b1013v][1:v][b1014v][0:v][b1015v][1:v][b1016v][0:v][b1017v][1:v][b1018v][0:v][b1019v][1:v][b1020v][0:v][b1021v][1:v][b1022v][0:v][b1023v][1:v][b1024v]
[0:v]concat=n=2049:v=1:a=0,format=yuv420p[v]" -map "[v]" /tmp/test.mp4


  


  the output is then this :

  


  ...
  Stream #1:0 (png) -> concat:in2038:v0
  Stream #1:0 (png) -> concat:in2042:v0
  Stream #1:0 (png) -> concat:in2046:v0
  format -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x563a0f537380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x563a0f537380] profile High, level 3.0
[libx264 @ 0x563a0f537380] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=6 lookahead_threads=1 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
Output #0, mp4, to '/tmp/test.mp4':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 640x480, q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc58.35.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Getötet   3 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x



  


  i create the filter complex by php with a for loop for creating the final syntax for ffmpeg.

  


  getting at the end of the command (debug log) :

  


  [auto_scaler_2044 @ 0x560f0db26c40] w:640 h:480 fmt:pal8 sar:0/1 -> w:640 h:480 fmt:yuv420p sar:0/1 flags:0x2
[auto_scaler_2045 @ 0x560f144cf240] w:640 h:480 fmt:pal8 sar:0/1 -> w:640 h:480 fmt:yuv420p sar:0/1 flags:0x2
[Parsed_blend_1022 @ 0x560f19f96d00] [framesync @ 0x560f19f96e08] Selected 1/25 time base
[Parsed_blend_1022 @ 0x560f19f96d00] [framesync @ 0x560f19f96e08] Sync level 2
[auto_scaler_3071 @ 0x560f18cf8a40] w:640 h:480 fmt:pal8 sar:0/1 -> w:640 h:480 fmt:yuv420p sar:0/1 flags:0x2
[auto_scaler_2046 @ 0x560f0db27180] w:640 h:480 fmt:pal8 sar:0/1 -> w:640 h:480 fmt:yuv420p sar:0/1 flags:0x2
[auto_scaler_2047 @ 0x560f144d00c0] w:640 h:480 fmt:pal8 sar:0/1 -> w:640 h:480 fmt:yuv420p sar:0/1 flags:0x2
[Parsed_blend_1023 @ 0x560f19f97400] [framesync @ 0x560f19f97508] Selected 1/25 time base
[Parsed_blend_1023 @ 0x560f19f97400] [framesync @ 0x560f19f97508] Sync level 2
[auto_scaler_3072 @ 0x560f18cf90c0] w:640 h:480 fmt:pal8 sar:0/1 -> w:640 h:480 fmt:yuv420p sar:0/1 flags:0x2
[scaler_out_0_0 @ 0x560f1a625140] w:640 h:480 fmt:yuv420p sar:0/1 -> w:640 h:480 fmt:yuv420p sar:0/1 flags:0x4
[libx264 @ 0x560f19103180] using mv_range_thread = 40
[libx264 @ 0x560f19103180] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x560f19103180] profile High, level 3.0
[libx264 @ 0x560f19103180] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=6 lookahead_threads=1 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
Output #0, mp4, to '/tmp/test.mp4':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0, 0, 1/12800: Video: h264 (libx264), 1 reference frame (avc1 / 0x31637661), yuv420p, 640x480, 0/1, q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc58.35.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Clipping frame in rate conversion by 0.000008
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream) 0x
cur_dts is invalid (this is harmless if it occurs once at the start per stream) 0x
cur_dts is invalid (this is harmless if it occurs once at the start per stream) 0x
Getötet


  


  is that the problem ?

  


  i have also tried with filter complex script, but the same error appears.

  


  thank you so much

  


  many greets iceget

  


  if i use a shorter time (about 10 seconds) then its working fine. but when i add 100 or 256 seconds, then i getting only a 1kb mp4 file.

  


  thank you