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• FFMPEG intermittent failures reading live RTMP stream

  22 janvier 2019, par stevendesu

  The Command

  I’m attempting to read a live RTMP stream and save the result to a file with the following command :

  ffmpeg -re -rtmp_live live -y -i "rtmp://<server>/<app>/<stream>" -c copy -f flv /tmp/dump.flv
  
  </stream></app></server>

  I run this command then after 10-15 seconds I kill the process and check /tmp/dump.flv. I’m trying to do this for stream diagnostic purposes (determine the encoding, bitrate, resolution, pixel format, and key frame interval of the live stream)

  This command works about 25-50% of the time. When it works FFMPEG takes about 5 seconds to connect to the stream, then it begins dumping data to disk. After I kill the process, I can find a couple of megabytes of video data in /tmp/dump.flv which can be probed using ffprobe.

  When the command fails, it goes into one of two failure states :

  Failure State 1

  stderr is flooded with a series of messages about "missing picture in access unit with size X", and the output file /tmp/dump.flv is created but contains 0 bytes

  ffmpeg version 3.4.4-1~16.04.york0 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  [NULL @ 0x55b72d568920] pps_id 381 out of range
  
  [AVBSFContext @ 0x55b72d5692c0] Invalid NAL unit 0, skipping.
  
      Last message repeated 1 times
  
  [h264 @ 0x55b72d568920] Invalid NAL unit 0, skipping.
  
      Last message repeated 1 times
  
  [h264 @ 0x55b72d568920] no frame!
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2200
  
  [AVBSFContext @ 0x55b72d5692c0] Invalid NAL unit 0, skipping.
  
      Last message repeated 2 times
  
  [h264 @ 0x55b72d568920] Invalid NAL unit 0, skipping.
  
      Last message repeated 2 times
  
  [h264 @ 0x55b72d568920] no frame!
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 3171
  
  [AVBSFContext @ 0x55b72d5692c0] Invalid NAL unit 0, skipping.
  
  [h264 @ 0x55b72d568920] Invalid NAL unit 0, skipping.
  
  [h264 @ 0x55b72d568920] no frame!
  
  [NULL @ 0x55b72d568920] missing picture in access unit with size 80572
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 1560
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2608
  
  [h264 @ 0x55b72d568920] non-existing PPS 0 referenced
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2734
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2885
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 77739
  
  [h264 @ 0x55b72d568920] non-existing PPS 254 referenced
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 3360
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2804
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 3051
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 3067
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 77693
  
  [h264 @ 0x55b72d568920] non-existing PPS 0 referenced
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2421
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2779
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2442
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2678
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 76877
  
  [h264 @ 0x55b72d568920] sps_id 15 out of range
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 1342
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2412
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 2238
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 3550
  
  [h264 @ 0x55b72d568920] missing picture in access unit with size 3075
  
  ...
  
  (after hitting Ctrl+C:)
  
  Input #0, flv, from 'rtmp://<server>/<app>/<stream>':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.83.100
  
    Duration: 00:00:00.00, start: 5285.919000, bitrate: N/A
  
      Stream #0:0: Video: h264 (Constrained Baseline), yuv420p, 1920x1080, 2543 kb/s, 24 fps, 24 tbr, 1k tbn, 48 tbc
  
  Output #0, flv, to '/tmp/dump.flv':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.83.100
  
      Stream #0:0: Video: h264 (Constrained Baseline) ([7][0][0][0] / 0x0007), yuv420p, 1920x1080, q=2-31, 2543 kb/s, 24 fps, 24 tbr, 1k tbn, 1k tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=    0 fps=0.0 q=-1.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Exiting normally, received signal 2.
  
  </stream></app></server>

  Failure State 2

  The message "No start code is found." is displayed and FFMPEG immediately terminates after less than a half-second. When this happens the file /tmp/dump.flv is not created.

  ffmpeg version 3.4.4-1~16.04.york0 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  [NULL @ 0x56274b0be920] missing picture in access unit with size 3710
  
  [AVBSFContext @ 0x56274b0bf2c0] No start code is found.
  
  rtmp://<server>/<app>/<stream>: could not find codec parameters
  
  Input #0, flv, from 'rtmp://<server>/<app>/<stream>':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.83.100
  
    Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264, none, 2543 kb/s, 24 fps, 1k tbn
  
  Output #0, flv, to '/tmp/dump.flv':
  
  Output file #0 does not contain any stream
  
  </stream></app></server></stream></app></server>

  What I’ve tried

  • Adding or removing -re to try and limit the input frame rate to the source frame rate
  • Adding or removing -rtmp_live live
  • Adding or removing -timeout 5 (or any other timeout value)
  • Using RTMP URL parameters (e.g. -i "rtmp://<server>/<app>/<stream> live=1 timeout=5"</stream></app></server>)

  Does anyone know why this command’s success is so intermittent or how I can get more consistent results ?

  Alternate Acceptable Solution

  The only reason I’m using ffmpeg to dump the stream to a temporary file at all is because I plan to perform multiple tests on the file (at least two at the moment — one to get the encoding, and another to get the key frame interval). By downloading the stream I reduce bandwidth usage and reduce runtime. However it’s perfectly acceptable to forego ffmpeg and just use ffprobe directly on the RTMP URL if this would help.

  Note that I did try this and I get the same two failure states with ffprobe

• First overlay text not lasting

  14 octobre 2018, par Pier Giorgio Misley

  I have this snippet of code, adding two overlayed texts with same effects/durations in two different part of my video.

  -i "input.mp4" -filter_complex "color=black:100x100,format=yuva444p[c];[c][0]scale2ref[ct][mv0]; [ct]setsar=1,split=2[t1][t2]; [t1]drawtext=fontfile=Arial.ttf:text='Pippo':fontcolor=white:fontsize=32:box=1: boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2 - 20,fade=t=in:st=6:d=2:alpha=1,fade=t=out:st=19:d=2:alpha=1[txta1];[t2]drawtext=fontfile=Arial.ttf:text='Topolino':fontcolor=white:fontsize=32:box=1: boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2 + 20,fade=t=in:st=6:d=2:alpha=1,fade=t=out:st=19:d=2:alpha=1[txta2];[mv0][txta1]overlay=0:0:shortest=1[mv1];[mv1][txta2]overlay=0:0:shortest=1" "output.mp4"

  Somewhy, the second text, "Topolino" lasts perfectly from the fade-in to the fade-out.

  The first text ("Pippo") is appearing and disappearing immediatly.

  They have the same effect, so what am I doing wrong ?

  Thanks

  ---

  Edit : added output

  Error : ffmpeg version N-90893-gcae6f806a6 Copyright (c) 2000-2018 the
  FFmpeg developers

  Error : built with gcc 7.3.0 (GCC)

  Error : configuration : —enable-gpl —enable-version3 —enable-sdl2
  —enable-bzlib —enable-fontconfig —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libfreetype —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-libopus —enable-libshine —enable-libsnappy —enable-libsoxr —enable-libtheora —enable-libtwolame —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libzimg —enable-lzma —enable-zlib —enable-gmp —enable-libvidstab —enable-libvorbis —enable-libvo-amrwbenc —enable-libmysofa —enable-libspeex —enable-libxvid —enable-libaom —enable-libmfx —enable-amf —enable-ffnvcodec —enable-cuvid —enable-d3d11va —enable-nvenc —enable-nvdec —enable-dxva2 —enable-avisynth

  Error : libavutil 56. 17.100 / 56. 17.100

  Error : libavcodec 58. 19.100 / 58. 19.100

  Error : libavformat 58. 13.100 / 58. 13.100

  Error : libavdevice 58. 4.100 / 58. 4.100

  Error : libavfilter 7. 21.100 / 7. 21.100

  Error : libswscale 5. 2.100 / 5. 2.100

  Error : libswresample 3. 2.100 / 3. 2.100

  Error : libpostproc 55. 2.100 / 55. 2.100

  Error : Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’D :\AREA\video.mp4’ :

  Error : Metadata :

  Error : major_brand : isom

  Error : minor_version : 512

  Error : compatible_brands : isomiso2avc1mp41

  Error : encoder : Lavf58.13.100

  Error : Duration : 00:02:12.50, start : 0.000000, bitrate : 3149 kb/s

  Error : Stream #0:0(und) : Video : h264 (High) (avc1 / 0x31637661),
  yuv420p(tv, bt709), 1024x600 [SAR 1:1 DAR 128:75], 3014 kb/s, 24 fps,
  24 tbr, 19200 tbn, 50 tbc (default)

  Error : Metadata :

  Error : handler_name : VideoHandler

  Error : timecode : 00:00:00:00

  Error : Stream #0:1(und) : Audio : aac (LC) (mp4a / 0x6134706D),
  44100 Hz, stereo, fltp, 129 kb/s (default)

  Error : Metadata :

  Error : handler_name : SoundHandler

  Error : Stream #0:2(eng) : Data : none (tmcd / 0x64636D74)

  Error : Metadata :

  Error : handler_name : TimeCodeHandler

  Error : timecode : 00:00:00:00

  Error : Fontconfig error : Cannot load default config file

  Error : [Parsed_drawtext_5 @ 000002a7c251ea00] Using
  "C :/WINDOWS/fonts/mingliub.ttc"

  Error : Fontconfig error : Cannot load default config file

  Error : [Parsed_drawtext_8 @ 000002a7c2c52a00] Using
  "C :/WINDOWS/fonts/mingliub.ttc"

  Error : Stream mapping :

  Error : Stream #0:0 (h264) -> scale2ref:ref (graph 0)

  Error : overlay (graph 0) -> Stream #0:0 (libx264)

  Error : Stream #0:1 -> #0:1 (aac (native) -> aac (native))

  Error : Press [q] to stop, [?] for help

  Error : Fontconfig error : Cannot load default config file

  Error : [Parsed_drawtext_5 @ 000002a7c3e6aec0] Using
  "C :/WINDOWS/fonts/mingliub.ttc"

  Error : Fontconfig error : Cannot load default config file

  Error : [Parsed_drawtext_8 @ 000002a7c3e6ac80] Using
  "C :/WINDOWS/fonts/mingliub.ttc"

  Error : [libx264 @ 000002a7c2a9d800] using SAR=1/1

  Error : [libx264 @ 000002a7c2a9d800] using cpu capabilities : MMX2
  SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2

  Error : [libx264 @ 000002a7c2a9d800] profile High, level 3.1

  Error : [libx264 @ 000002a7c2a9d800] 264 - core 155 r2901 7d0ff22 -
  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=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=24 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

  Error : Output #0, mp4, to ’D :\AREA\output_text.mp4’ :

  Error : Metadata :

  Error : major_brand : isom

  Error : minor_version : 512

  Error : compatible_brands : isomiso2avc1mp41

  Error : encoder : Lavf58.13.100

  Error : Stream #0:0 : Video : h264 (libx264) (avc1 / 0x31637661),
  yuv420p, 1024x600 [SAR 1:1 DAR 128:75], q=-1—1, 24 fps, 12288 tbn, 24
  tbc (default)

  Error : Metadata :

  Error : encoder : Lavc58.19.100 libx264

  Error : Side data :

  Error : cpb : bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay :
  -1

  Error : Stream #0:1(und) : Audio : aac (LC) (mp4a / 0x6134706D),
  44100 Hz, stereo, fltp, 128 kb/s (default)

  Error : Metadata :

  Error : handler_name : SoundHandler

  Error : encoder : Lavc58.19.100 aac

  Error : frame= 61 fps=0.0 q=28.0 size= 0kB time=00:00:02.83
  bitrate= 0.1kbits/s speed=5.65x

  Error : frame= 137 fps=136 q=28.0 size= 0kB time=00:00:05.99
  bitrate= 0.1kbits/s speed=5.94x

  [...]

  Error : frame= 3180 fps= 88 q=-1.0 Lsize= 16533kB time=00:02:12.51
  bitrate=1022.0kbits/s speed=3.65x

  Error : video:14352kB audio:2080kB subtitle:0kB other streams:0kB
  global headers:0kB muxing overhead : 0.611671%

  Error : [libx264 @ 000002a7c2a9d800] frame I:14 Avg QP:17.18 size :
  42960

  Error : [libx264 @ 000002a7c2a9d800] frame P:1170 Avg QP:20.09 size :
  9916

  Error : [libx264 @ 000002a7c2a9d800] frame B:1996 Avg QP:21.54 size :
  1249

  Error : [libx264 @ 000002a7c2a9d800] consecutive B-frames : 3.3% 38.3%
  2.5% 56.0%

  Error : [libx264 @ 000002a7c2a9d800] mb I I16..4 : 27.0% 61.1% 11.8%

  Error : [libx264 @ 000002a7c2a9d800] mb P I16..4 : 4.3% 5.8% 0.3%
  P16..4 : 34.6% 9.8% 7.3% 0.0% 0.0% skip:38.0%

  Error : [libx264 @ 000002a7c2a9d800] mb B I16..4 : 0.3% 0.5% 0.0%
  B16..8 : 19.5% 0.9% 0.1% direct : 2.0% skip:76.6% L0:39.8% L1:55.2%
  BI : 5.0%

  Error : [libx264 @ 000002a7c2a9d800] 8x8 transform intra:57.0%
  inter:84.0%

  Error : [libx264 @ 000002a7c2a9d800] coded y,uvDC,uvAC intra : 33.3%
  65.4% 24.9% inter : 10.4% 17.5% 2.4%

  Error : [libx264 @ 000002a7c2a9d800] i16 v,h,dc,p : 59% 17% 12% 13%

  Error : [libx264 @ 000002a7c2a9d800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 35%
  15% 33% 2% 3% 3% 3% 3% 2%

  Error : [libx264 @ 000002a7c2a9d800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu : 36%
  18% 13% 4% 6% 7% 6% 6% 4%

  Error : [libx264 @ 000002a7c2a9d800] i8c dc,h,v,p : 52% 17% 24% 7%

  Error : [libx264 @ 000002a7c2a9d800] Weighted P-Frames : Y:29.0%
  UV:17.2%

  Error : [libx264 @ 000002a7c2a9d800] ref P L0 : 65.1% 15.7% 14.5% 4.3%
  0.5%

  Error : [libx264 @ 000002a7c2a9d800] ref B L0 : 89.7% 8.2% 2.1%

  Error : [libx264 @ 000002a7c2a9d800] ref B L1 : 98.1% 1.9%

  Error : [libx264 @ 000002a7c2a9d800] kb/s:887.30

  Error : [aac @ 000002a7c24a6e00] Qavg : 179.786

  Error :

• FFmpeg skips generating thumbs

  25 janvier 2018, par Awais fiaz

  I am using ffmpeg for creating thumbs out of videos within php script however ffmpeg skips creating thumbs sometimes but sometimes it goes okay and works fine i am a little confused of this strange behavior.

  Command which fails :

  Command : /opt/bin/ffmpeg -ss 00:00:06 -i /home/my/public_html/files/conversion_queue/1516767375521d6.mp4 -an -r 1 -y -f image2 -vframes 1 /home/my/public_html/files/thumbs/2018/01/24/1516767375521d6-original-1.jpg 

  Output error

  [image2 @ 0x2eaab00] Could not open file : /home/my/public_html/files/thumbs/2018/01/24/1516767375521d6-original-1.jpg
  
  av_interleaved_write_frame(): Input/output error
  
  frame= 1 fps=0.0 q=7.1 Lsize=N/A time=00:00:01.00 bitrate=N/A speed=25.3x 
  
  video:41kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Conversion failed! 

  Command which works fine :

  Command : /opt/bin/ffmpeg -ss 00:01:01 -i /home/my/public_html/files/conversion_queue/1516867108c557e.mp4 -an -r 1 -y -f image2 -vframes 1 /home/my/public_html/files/thumbs/2018/01/25/1516867108c557e-original-1.jpg

  Output

  frame= 1 fps=0.0 q=3.1 Lsize=N/A time=00:00:01.00 bitrate=N/A speed=49.9x 
  
  video:21kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

  Although both are same but still i am facing this issue.
  Any help regarding this would be really appreciated.