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  • Remove black frames and sync audio with ffmpeg

    24 janvier 2020, par rahim123

    I’m trying to figure out a way to automatically process .mp4 or .mkv videos that have been manually edited to remove a bunch of segments, leaving many blank spaces (black frames with no audio). I want to remove all but one black frame (although I would settle for removing all of them if it’s much simpler) and then also sync the audio after the video timings change.

    I found this question and tried the three main suggestions :

    1. ffmpeg -i in.mkv -vf mpdecimate,setpts=N/FRAME_RATE/TB out.mkv
    2. ffmpeg -i in.mkv -vf [mpdecimate][] out.mkv
    3. ffmpeg -i in.mkv -vf [decimate][]=cycle=6,[setpts][]=N/25/TB out.mkv

    The first one does eliminate the black segments, but it doesn’t sync the audio. The other two commands don’t work :

    > ffmpeg -i in.mp4 -vf [decimate][]=cycle=6,[setpts][]=N/25/TB out.mp4
    
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 9 (SUSE Linux)
    
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g' --optflags='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --disable-openssl --enable-avresample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcelt --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdc1394 --enable-libdrm --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libssh --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lto --enable-lv2 --enable-libmfx --enable-vaapi --enable-vdpau --enable-libfdk-aac-dlopen --enable-nonfree --enable-libvo-amrwbenc --enable-version3 --enable-libx264 --enable-libx265 --enable-librtmp --enable-libxvid
    
  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
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.20.100
    
  Duration: 00:34:23.62, start: 0.000000, bitrate: 506 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/unknown/smpte170m), 640x480 [SAR 1:1 DAR 4:3], 412 kb/s, 29.97 fps, 29.97 tbr, 1867500000.00 tbn, 59.94 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 86 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[AVFilterGraph @ 0x55ece8def080] Bad (empty?) label found in the following: "[]=cycle=6,[setpts][]=N/25/TB".
    
Error reinitializing filters!
    
Failed to inject frame into filter network: Invalid argument
    
Error while processing the decoded data for stream #0:0
    
[aac @ 0x55ece8c5be80] Qavg: 222.643
    
[aac @ 0x55ece8c5be80] 2 frames left in the queue on closing
    
Conversion failed!
    > ffmpeg -i in.mp4 -vf [decimate][]=cycle=6,[setpts][]=N/25/TB out.mp4
    
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 9 (SUSE Linux)
    
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g' --optflags='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --disable-openssl --enable-avresample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcelt --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdc1394 --enable-libdrm --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libssh --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lto --enable-lv2 --enable-libmfx --enable-vaapi --enable-vdpau --enable-libfdk-aac-dlopen --enable-nonfree --enable-libvo-amrwbenc --enable-version3 --enable-libx264 --enable-libx265 --enable-librtmp --enable-libxvid
    
  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
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.20.100
    
  Duration: 00:34:23.62, start: 0.000000, bitrate: 506 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/unknown/smpte170m), 640x480 [SAR 1:1 DAR 4:3], 412 kb/s, 29.97 fps, 29.97 tbr, 1867500000.00 tbn, 59.94 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 86 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[AVFilterGraph @ 0x558b0d48af80] Bad (empty?) label found in the following: "[]=cycle=6,[setpts][]=N/25/TB".
    
Error reinitializing filters!
    
Failed to inject frame into filter network: Invalid argument
    
Error while processing the decoded data for stream #0:0
    
[aac @ 0x558b0d2f7e80] Qavg: 222.643
    
[aac @ 0x558b0d2f7e80] 2 frames left in the queue on closing
    
Conversion failed!

    I also tried this script, but it also fails to sync the audio. I tried with both .mp4 and .mkv source files. Thanks for the help.

  • FFMPEG cannot encode .MP4 to usable .Y4M RAW video : "Operation not permitted"

    26 janvier 2020, par Ham789

    I am running ffmpeg version 4.2.2 on macOS Sierra and I cannot decode a RAW video.

    First I create the .Y4M video :

    ffmpeg -y -i inputfolder/GH012088.MP4 temp_raw_video.Y4M

    Then I try to input it to ffmpeg :

    ffmpeg -i temp_raw_video.Y4M

    However I get the following error in the terminal : temp_raw_video.Y4M: Operation not permitted

    I have checked the permissions for the ’temp_raw_video.Y4M’ file and I have both read and write permissions.

    I have tried the above with .MOV videos from an iPhone and it works fine.

    The problem seems to be with the .MP4 videos I am trying to convert. These videos were taken with a GoPro camera.

    What is going on here ? Please see the GH012088.MP4 file info below :

    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb9b6809400] Using non-standard frame rate 29/1
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'inputfolder/GH012088.MP4':
    
  Metadata:
    
    major_brand     : mp41
    
    minor_version   : 538120216
    
    compatible_brands: mp41
    
    creation_time   : 2019-12-28T14:12:04.000000Z
    
    firmware        : HD7.01.01.61.00
    
  Duration: 00:00:40.47, start: 0.000000, bitrate: 60267 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 60015 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro AVC  
    
      encoder         : GoPro AVC encoder
    
      timecode        : 14:40:34:06
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro AAC  
    
      timecode        : 14:40:34:06
    
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro TCD  
    
      timecode        : 14:40:34:06
    
    Stream #0:3(eng): Data: bin_data (gpmd / 0x646D7067), 37 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro MET  
    
    Stream #0:4(eng): Data: none (fdsc / 0x63736466), 10 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro SOS

    Here is the output log for creating the .Y4M :

    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fa9da802200] Using non-standard frame rate 29/1
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'inputfolder/GH012088.MP4':
    
  Metadata:
    
    major_brand     : mp41
    
    minor_version   : 538120216
    
    compatible_brands: mp41
    
    creation_time   : 2019-12-28T14:12:04.000000Z
    
    firmware        : HD7.01.01.61.00
    
  Duration: 00:00:40.47, start: 0.000000, bitrate: 60267 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 60015 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro AVC  
    
      encoder         : GoPro AVC encoder
    
      timecode        : 14:40:34:06
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro AAC  
    
      timecode        : 14:40:34:06
    
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro TCD  
    
      timecode        : 14:40:34:06
    
    Stream #0:3(eng): Data: bin_data (gpmd / 0x646D7067), 37 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro MET  
    
    Stream #0:4(eng): Data: none (fdsc / 0x63736466), 10 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro SOS  
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
    
Press [q] to stop, [?] for help
    
Output #0, yuv4mpegpipe, to 'temp_raw_video.Y4M':
    
  Metadata:
    
    major_brand     : mp41
    
    minor_version   : 538120216
    
    compatible_brands: mp41
    
    firmware        : HD7.01.01.61.00
    
    encoder         : Lavf58.29.100
    
    Stream #0:0(eng): Video: wrapped_avframe, yuvj420p, 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc (default)
    
    Metadata:
    
      creation_time   : 2019-12-28T14:12:04.000000Z
    
      handler_name    : GoPro AVC  
    
      timecode        : 14:40:34:06
    
      encoder         : Lavc58.54.100 wrapped_avframe
    
frame=   43 fps=0.0 q=-0.0 size=  522240kB time=00:00:01.43 bitrate=2981801.3kbiframe=   92 fps= 90 q=-0.0 size= 1117696kB time=00:00:03.06 bitrate=2982723.8kbiframe=  144 fps= 95 q=-0.0 size= 1749504kB time=00:00:04.80 bitrate=2982837.3kbiframe=  190 fps= 94 q=-0.0 size= 2308352kB time=00:00:06.33 bitrate=2982809.6kbiframe=  241 fps= 95 q=-0.0 size= 2928128kB time=00:00:08.04 bitrate=2982978.5kbiframe=  287 fps= 94 q=-0.0 size= 3486976kB time=00:00:09.57 bitrate=2982937.8kbiframe=  336 fps= 95 q=-0.0 size= 4082176kB time=00:00:11.21 bitrate=2982837.3kbiframe=  388 fps= 96 q=-0.0 size= 4713984kB time=00:00:12.94 bitrate=2982864.2kbiframe=  436 fps= 96 q=-0.0 size= 5297152kB time=00:00:14.54 bitrate=frame= 1213 fps= 95 q=-0.0 Lsize=14737957kB time=00:00:40.47 bitrate=2983002.4kbits/s speed=3.19x      
    
video:635kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2321095.250000%

  • How to fix scrambled output

    26 janvier 2020, par Krishnakumar

    I am seeing the following scrambled output for a live stream when processing an udp input stream. I am using the recently downloaded ffmpeg from GIT. Stop and Start of ffmpeg command resolves the issues temporarily.

    Scrambled Out

    Sample Logs :

        Sun Jan 26 03:52:00 2020 ffmpeg version N-94528-gfaa9cd3 Copyright (c) 2000-2019 the FFmpeg developers
    
Sun Jan 26 03:52:00 2020   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-36)
    
Sun Jan 26 03:52:00 2020   configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --extra-libs=-lpthread --extra-libs=-lm --bindir=/root/bin --enable-gpl --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree --enable-openssl
    
Sun Jan 26 03:52:00 2020   libavutil      56. 33.100 / 56. 33.100
    
Sun Jan 26 03:52:00 2020   libavcodec     58. 55.100 / 58. 55.100
    
Sun Jan 26 03:52:00 2020   libavformat    58. 30.100 / 58. 30.100
    
Sun Jan 26 03:52:00 2020   libavdevice    58.  9.100 / 58.  9.100
    
Sun Jan 26 03:52:00 2020   libavfilter     7. 58.100 /  7. 58.100
    
Sun Jan 26 03:52:00 2020   libswscale      5.  6.100 /  5.  6.100
    
Sun Jan 26 03:52:00 2020   libswresample   3.  6.100 /  3.  6.100
    
Sun Jan 26 03:52:00 2020   libpostproc    55.  6.100 / 55.  6.100
    

    

    
Sun Jan 26 04:02:46 2020 [h264 @ 0x4d988c0] illegal short term buffer state detected
    
Sun Jan 26 04:02:46 2020 [h264 @ 0x4e54f80] reference picture missing during reorder
    
Sun Jan 26 04:02:46 2020     Last message repeated 1 times
    
Sun Jan 26 04:02:46 2020 [h264 @ 0x4e54f80] Missing reference picture, default is 56257016
    
Sun Jan 26 04:02:46 2020     Last message repeated 1 times
    
Sun Jan 26 04:02:46 2020 [h264 @ 0x4cc2e00] mmco: unref short failure
    
Sun Jan 26 04:02:46 2020 [h264 @ 0x594f4c0] illegal short term buffer state detected
    
Sun Jan 26 04:02:46 2020 [h264 @ 0x4f66800] reference picture missing during reorder
    
Sun Jan 26 04:02:46 2020 [h264 @ 0x4f66800] Missing reference picture, default is 56257692
    
Sun Jan 26 04:02:46 2020 [h264 @ 0x4c75a00] mmco: unref short failure
    
Sun Jan 26 04:02:46 2020 [h264 @ 0x4d988c0] illegal short term buffer state detected
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4e54f80] reference picture missing during reorder
    
Sun Jan 26 04:02:47 2020     Last message repeated 1 times
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4e54f80] Missing reference picture, default is 56257032
    
Sun Jan 26 04:02:47 2020     Last message repeated 1 times
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4cc16c0] reference picture missing during reorder
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4cc16c0] Missing reference picture, default is 56257700
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4cc2e00] mmco: unref short failure
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x594f4c0] illegal short term buffer state detected
    
Sun Jan 26 04:02:47 2020 udp://230.1.1.2:12000?fifo_size=5000000&overrun_nonfatal=1: corrupt decoded frame in stream 3
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4f66800] reference picture missing during reorder
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4f66800] Missing reference picture, default is 56257708
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4c75a00] mmco: unref short failure
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4d988c0] illegal short term buffer state detected
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4e54f80] reference picture missing during reorder
    
Sun Jan 26 04:02:47 2020     Last message repeated 1 times
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4e54f80] Missing reference picture, default is 56257048
    
Sun Jan 26 04:02:47 2020     Last message repeated 1 times
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4cc16c0] reference picture missing during reorder
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4cc16c0] Missing reference picture, default is 56257716
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x4cc2e00] mmco: unref short failure
    
Sun Jan 26 04:02:47 2020 [h264 @ 0x594f4c0] illegal short term buffer state detected

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