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• Revision 33677 : une structure commune avec le plugin commentaires, mais : - qui n’est pas ...

  11 décembre 2009, par cedric@… — Log

  une structure commune avec le plugin commentaires, mais : - qui n’est pas encore stabilisee, dixit son auteure - qui garde aussi le nommage original de la dist pour des raisons de compatibilite dans le but de permettre la transition la suite reprendra apres la finalisation des travaux de (...)

• ffmpeg drops every frame except the first

  3 juin 2021, par lpaseen

  I'm trying to make an app that currently works fine on ubuntu 16.04 to run on ubuntu 20.04.
The setup is that :

  


  

  • v4l2loopback is used to create 4 new video devices - video[2345]

  


  • it's a webcamera on /dev/video0

  


  • this camera is split to /dev/video2,3
with

  


  


  gst-launch-1.0 -v v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480 ! tee name=rec ! queue ! v4l2sink device=/dev/video2 rec. ! queue ! v4l2sink device=/dev/video3


  


  

  • next it's a ffmpeg command that takes the input and streams it to a websocket

  


  


  ffmpeg -video_size 640x480 -framerate 30 -f video4linux2 -i /dev/video2 -f mpegts -codec:v mpeg1video -s 640x480 -b:v 800k -bf 0 -r 30 -vf scale=640:480 http://localhost:8016/thepassword/640/480/


  


  This works fine under ubuntu 16.04 but with 20.04 it drops every frame after the first one, and the first frame is only sent out the stream once it exits.

  


  root@lab16:~# ffmpeg -v 40 -video_size 640x480 -framerate 30 -f video4linux2 -i /dev/video2 -f mpegts -codec:v mpeg1video -s 640x480 -b:v 800k -bf 0 -r 30 -vf scale=640:480 http://localhost:8016/thepassword/640/480/
ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[video4linux2,v4l2 @ 0x556a62441940] fd:3 capabilities:85208003
[video4linux2,v4l2 @ 0x556a62441940] The driver does not permit changing the time per frame
Input #0, video4linux2,v4l2, from '/dev/video2':
  Duration: N/A, start: 45841.354189, bitrate: 147456 kb/s
    Stream #0:0: Video: rawvideo, 1 reference frame (YUY2 / 0x32595559), yuyv422, 640x480, 147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
[tcp @ 0x556a6244c280] Starting connection attempt to 127.0.0.1 port 8016
[tcp @ 0x556a6244c280] Successfully connected to 127.0.0.1 port 8016
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg1video (native))
Press [q] to stop, [?] for help
[Parsed_scale_0 @ 0x556a62457680] w:640 h:480 flags:'bicubic' interl:0
[graph 0 input from stream 0:0 @ 0x556a62458200] w:640 h:480 pixfmt:yuyv422 tb:1/1000000 fr:30/1 sar:0/1 sws_param:flags=2
[scaler_out_0_0 @ 0x556a62459580] w:640 h:480 flags:'bicubic' interl:0
[Parsed_scale_0 @ 0x556a62457680] w:640 h:480 fmt:yuyv422 sar:0/1 -> w:640 h:480 fmt:yuyv422 sar:0/1 flags:0x4
[scaler_out_0_0 @ 0x556a62459580] w:640 h:480 fmt:yuyv422 sar:0/1 -> w:640 h:480 fmt:yuv420p sar:0/1 flags:0x4
[mpegts @ 0x556a624454c0] muxrate VBR, pcr every 3 pkts, sdt every 200, pat/pmt every 40 pkts
Output #0, mpegts, to 'http://localhost:8016/thepassword/640/480/':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: mpeg1video, 1 reference frame, yuv420p, 640x480, q=2-31, 800 kb/s, 30 fps, 90k tbn, 30 tbc
    Metadata:
      encoder         : Lavc58.54.100 mpeg1video
    Side data:
      cpb: bitrate max/min/avg: 0/0/800000 buffer size: 0 vbv_delay: -1
*** dropping frame 1 from stream 0 at ts -1319706
*** dropping frame 1 from stream 0 at ts -1319705
*** dropping frame 1 from stream 0 at ts -1319704
*** dropping frame 1 from stream 0 at ts -1319703
*** dropping frame 1 from stream 0 at ts -1319702
*** dropping frame 1 from stream 0 at ts -1319701
*** dropping frame 1 from stream 0 at ts -1319700
*** dropping frame 1 from stream 0 at ts -1319699
*** dropping frame 1 from stream 0 at ts -1319698
*** dropping frame 1 from stream 0 at ts -1319697
*** dropping frame 1 from stream 0 at ts -1319696
*** dropping frame 1 from stream 0 at ts -1319695
*** dropping frame 1 from stream 0 at ts -1319694
*** dropping frame 1 from stream 0 at ts -1319693
*** dropping frame 1 from stream 0 at ts -1319692:00:00.00 bitrate=N/A dup=0 drop=14 speed=   0x
*** dropping frame 1 from stream 0 at ts -1319691
*** dropping frame 1 from stream 0 at ts -1319690
*** dropping frame 1 from stream 0 at ts -1319689
*** dropping frame 1 from stream 0 at ts -1319688
*** dropping frame 1 from stream 0 at ts -1319687
frame=    1 fps=0.0 q=3.4 Lsize=      11kB time=00:00:00.00 bitrate=7930181.8kbits/s dup=0 drop=21 speed=1.49e-05x
video:9kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 13.335412%
Input file #0 (/dev/video2):
  Input stream #0:0 (video): 22 packets read (13516800 bytes); 22 frames decoded;
  Total: 22 packets (13516800 bytes) demuxed
Output file #0 (http://localhost:8016/thepassword/640/480/):
  Output stream #0:0 (video): 1 frames encoded; 1 packets muxed (9621 bytes);
  Total: 1 packets (9621 bytes) muxed
[AVIOContext @ 0x556a62454b80] Statistics: 0 seeks, 1 writeouts


  


  (I hit "q" to end it)

  


  If I stop gst-launch and use same command to read from the real device (/dev/video0) it all works.

  


  If I run DISPLAY=:0 ffplay /dev/video0 I get a streaming video on the screen

  


  I tried reducing options in the ffmpeg command but even going down to what I guess is the minimum of

  


  ffmpeg -f video4linux2 -i /dev/video2 -f mpeg1video http://localhost:8016/thepassword/640/480/


  


  it still drops all frames.

  


  I can get it all to work by using ffmpeg to split it instead of gst-launch so doing

  


  ffmpeg -f video4linux2 -i /dev/video0 -codec copy -f v4l2 /dev/video3 -codec copy -f v4l2 /dev/video4


  


  then all works except that I dunno how reliable that is on 16.04 and it requires a lot of code changes (ffmpeg output is very different from gst-launch)

  


  I was hoping to just add a flag/plugin or something to the gst-launch/ffmpeg command to get it to work. Any chance that I can do that or is replacing gst-launch with ffmpeg the only option ?

  


• How to concatenate 3 mp4 files using ffmpeg (facing error in resultant video) ?

  5 février 2021, par Mayank Thapliyal

  I have 3 videos of mp4 format. They have same resolution (640 X 1280) but other properties like frame rate etc are different. I want to join them back to back.So I gave a check on internet and I used the following method

  


  :: Create File List
echo file file1.mp4 >  mylist.txt 
echo file file2.mp4 >> mylist.txt
echo file file3.mp4 >> mylist.txt

:: Concatenate Files
ffmpeg -f concat -i mylist.txt -c copy output.mp4


  


  But unfortunately it did not worked.In the resultant video, file1 part got freezed, and audio of whole video shifted (no idea how).And other methods are also not working properly

  


  I just want to join them back to back.Any idea how to do it ?

  


  Edit :- I gave a check on the output of the ffmpeg (using pause command in bat and discovered the following. Maybe it may help regarding the issue)

  


  C:\Users\Cascade_Games\Desktop\Cascade Empire\ffmpeg-4.3.1-2020-10-01-full_build\bin>ffmpeg -f concat -i mylist.txt -vcodec copy -acodec copy Mux1.mp4
ffmpeg version 4.3.1-2020-10-01-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.0 (Rev3, 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-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --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-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      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002a0474e6a40] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from 'mylist.txt':
  Duration: N/A, start: -0.023220, bitrate: 2447 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x640 [SAR 1:1 DAR 2:1], 2320 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc
    Metadata:
      handler_name    : VideoHandle
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s
    Metadata:
      handler_name    : SoundHandler
Output #0, mp4, to 'Mux1.mp4':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x640 [SAR 1:1 DAR 2:1], q=2-31, 2320 kb/s, 30 fps, 30 tbr, 15360 tbn, 15360 tbc
    Metadata:
      handler_name    : VideoHandle
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002a04750d700] Auto-inserting h264_mp4toannexb bitstream filter
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002a0474ef040] Auto-inserting h264_mp4toannexb bitstream filter
[mp4 @ 000002a0478e09c0] Non-monotonous DTS in output stream 0:1; previous: 30282976, current: 27826977; changing to 30282977. This may result in incorrect timestamps in the output file.
[mp4 @ 000002a0478e09c0] Non-monotonous DTS in output stream 0:1; previous: 30282977, current: 27828129; changing to 30282978. This may result in incorrect timestamps in the output file.
(Same Thing was getting repeated,hence I deleted it)
[mp4 @ 000002a0478e09c0] Non-monotonous DTS in output stream 0:1; previous: 30283209, current: 28095393; changing to 30283210. This may result in incorrect timestamps in the output file.
[mp4 @ 000002a0478e09c0] Non-monotonous DTS in output stream 0:1; previous: 30283210, current: 28096545; changing to 30283211. This may result in incorrect timestamps in the output file.
[mp4 @ 000002a0478e09c0] aac bitstream error
    Last message repeated 234 times
frame=18937 fps=11438 q=-1.0 Lsize=   49051kB time=00:11:26.69 bitrate= 585.2kbits/s speed= 415x
video:40720kB audio:7653kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.401324%


  


  Edit :-
Info of all files (I have changed the video name to 1.mp4,2.mp4,3.mp4)

  


  C:\Users\Cascade_Games\Desktop\Cascade Empire\ffmpeg-4.3.1-2020-10-01-full_build\bin>ffmpeg -i 1.mp4 -i 2.mp4 -i 3.mp4
ffmpeg version 4.3.1-2020-10-01-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.0 (Rev3, 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-lzma --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --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-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      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
  Duration: 00:00:05.27, start: 0.000000, bitrate: 2337 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x640 [SAR 1:1 DAR 2:1], 2320 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandle
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
  Duration: 00:10:25.70, start: 0.000000, bitrate: 616 kb/s
    Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x640 [SAR 1:1 DAR 2:1], 511 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 96 kb/s (default)
    Metadata:
      handler_name    : SoundHandle
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '3.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
  Duration: 00:00:08.50, start: 0.000000, bitrate: 447 kb/s
    Stream #2:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 1280x640 [SAR 1:1 DAR 2:1], 228 kb/s, 2 fps, 2 tbr, 16384 tbn, 4 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #2:1(und): Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 319 kb/s (default)
    Metadata:
      handler_name    : SoundHandler