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  • Video becomes choppy when the order in the hstack filter is changed

    25 octobre 2018, par Mayank

    I have a FFmpeg command wherein I am merging 2 videos side by side using hstack filter. When I place first video on the right hand side and second video on the left hand side, the final merged video is perfect in quality and plays smoothly.

    However, when I swap the order in hstack filter, the final video is very choppy.

    Can someone please let me know the issue in this command ? Many thanks in advance.

    Also, the file size of the non working file is almost double than that of working file. Can you explain why ?

    Here is the working command :

    ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024 -i 1_v.mp4 -itsoffset 0.113 -i 2_v.mp4 -filter_complex "[1:a]adelay=15646|15646[a1]; [0:a][a1]amix; [3:v]trim=0:15.646,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [3_v_silence][2:v]hstack" -preset ultrafast -y n_m_bars_try2.mp4

    output :

    ffmpeg version 4.0.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
    
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
    
  libavutil      56. 14.100 / 56. 14.100
    
  libavcodec     58. 18.100 / 58. 18.100
    
  libavformat    58. 12.100 / 58. 12.100
    
  libavdevice    58.  3.100 / 58.  3.100
    
  libavfilter     7. 16.100 /  7. 16.100
    
  libswscale      5.  1.100 /  5.  1.100
    
  libswresample   3.  1.100 /  3.  1.100
    
  libpostproc    55.  1.100 / 55.  1.100
    
Input #0, ogg, from '1_a.opus':
    
  Duration: 00:01:03.82, start: -0.020000, bitrate: 37 kb/s
    
    Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
    
Input #1, ogg, from '2_a.opus':
    
  Duration: 00:00:52.40, start: -0.020000, bitrate: 44 kb/s
    
    Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp
    
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1_v.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.12.100
    
  Duration: 00:01:03.85, start: 0.000000, bitrate: 2644 kb/s
    
    Stream #2:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2633 kb/s, 333 fps, 333 tbr, 10656 tbn, 666 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '2_v.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.12.100
    
  Duration: 00:00:52.32, start: 0.000000, bitrate: 861 kb/s
    
    Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 860 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
Stream mapping:
    
  Stream #0:0 (opus) -> amix:input0
    
  Stream #1:0 (opus) -> adelay
    
  Stream #2:0 (h264) -> hstack:input1
    
  Stream #3:0 (h264) -> trim
    
  Stream #3:0 (h264) -> fifo
    
  amix -> Stream #0:0 (aac)
    
  hstack -> Stream #0:1 (libx264)
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x528d600] using SAR=1/1
    
[libx264 @ 0x528d600] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle
    
[libx264 @ 0x528d600] profile Constrained Baseline, level 3.1
    
[libx264 @ 0x528d600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 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=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
    
Output #0, mp4, to 'navid_mayank_bars_try2.mp4':
    
  Metadata:
    
    encoder         : Lavf58.12.100
    
    Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc58.18.100 aac
    
    Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x480 [SAR 1:1 DAR 8:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc58.18.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
frame= 1704 fps= 42 q=-1.0 Lsize=   14440kB time=00:01:08.12 bitrate=1736.5kbits/s dup=3 drop=21229 speed=1.69x    
    
video:13448kB audio:953kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.269503%
    
[aac @ 0x52b8680] Qavg: 22255.799
    
[libx264 @ 0x528d600] frame I:7     Avg QP:16.29  size: 46284
    
[libx264 @ 0x528d600] frame P:1697  Avg QP:18.36  size:  7924
    
[libx264 @ 0x528d600] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x528d600] mb P  I16..4:  1.8%  0.0%  0.0%  P16..4: 31.0%  0.0%  0.0%  0.0%  0.0%    skip:67.2%
    
[libx264 @ 0x528d600] coded y,uvDC,uvAC intra: 29.9% 59.3% 17.5% inter: 13.4% 24.6% 0.8%
    
[libx264 @ 0x528d600] i16 v,h,dc,p: 36% 29% 18% 17%
    
[libx264 @ 0x528d600] i8c dc,h,v,p: 42% 25% 21% 11%
    
[libx264 @ 0x528d600] kb/s:1616.23

    Non working command :

    ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024 -i 1_v.mp4 -itsoffset 0.113 -i 2_v.mp4 -filter_complex "[1:a]adelay=15646|15646[a1]; [0:a][a1]amix; [3:v]trim=0:15.646,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [2:v][3_v_silence]hstack" -preset ultrafast -y m_n_bars_try2.mp4

    output :

    ffmpeg version 4.0.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
    
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
    
  libavutil      56. 14.100 / 56. 14.100
    
  libavcodec     58. 18.100 / 58. 18.100
    
  libavformat    58. 12.100 / 58. 12.100
    
  libavdevice    58.  3.100 / 58.  3.100
    
  libavfilter     7. 16.100 /  7. 16.100
    
  libswscale      5.  1.100 /  5.  1.100
    
  libswresample   3.  1.100 /  3.  1.100
    
  libpostproc    55.  1.100 / 55.  1.100
    
Input #0, ogg, from '1_a.opus':
    
  Duration: 00:01:03.82, start: -0.020000, bitrate: 37 kb/s
    
    Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
    
Input #1, ogg, from '2_a.opus':
    
  Duration: 00:00:52.40, start: -0.020000, bitrate: 44 kb/s
    
    Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp
    
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1_v.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.12.100
    
  Duration: 00:01:03.85, start: 0.000000, bitrate: 2644 kb/s
    
    Stream #2:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2633 kb/s, 333 fps, 333 tbr, 10656 tbn, 666 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '2_v.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.12.100
    
  Duration: 00:00:52.32, start: 0.000000, bitrate: 861 kb/s
    
    Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 860 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
Stream mapping:
    
  Stream #0:0 (opus) -> amix:input0
    
  Stream #1:0 (opus) -> adelay
    
  Stream #2:0 (h264) -> hstack:input0
    
  Stream #3:0 (h264) -> trim
    
  Stream #3:0 (h264) -> fifo
    
  amix -> Stream #0:0 (aac)
    
  hstack -> Stream #0:1 (libx264)
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x6d21600] using SAR=1/1
    
[libx264 @ 0x6d21600] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle
    
[libx264 @ 0x6d21600] profile Constrained Baseline, level 5.1
    
[libx264 @ 0x6d21600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 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=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
    
Output #0, mp4, to 'mayank_navid_bars_try2.mp4':
    
  Metadata:
    
    encoder         : Lavf58.12.100
    
    Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc58.18.100 aac
    
    Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x480 [SAR 1:1 DAR 8:3], q=-1--1, 333 fps, 10656 tbn, 333 tbc (default)
    
    Metadata:
    
      encoder         : Lavc58.18.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
Past duration 0.999992 too large
    
    Last message repeated 12 times
    
More than 1000 frames duplicated   33280kB time=00:01:08.03 bitrate=4007.4kbits/s dup=982 drop=1590 speed=0.536x    
    
frame=22679 fps=177 q=-1.0 Lsize=   33892kB time=00:01:08.10 bitrate=4076.9kbits/s dup=1339 drop=1590 speed=0.531x    
    
video:32804kB audio:953kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.401324%
    
[aac @ 0x6d4c680] Qavg: 22255.799
    
[libx264 @ 0x6d21600] frame I:91    Avg QP:15.31  size: 51639
    
[libx264 @ 0x6d21600] frame P:22588 Avg QP:18.24  size:  1279
    
[libx264 @ 0x6d21600] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x6d21600] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4: 13.0%  0.0%  0.0%  0.0%  0.0%    skip:86.8%
    
[libx264 @ 0x6d21600] coded y,uvDC,uvAC intra: 44.9% 54.0% 29.9% inter: 2.0% 10.9% 0.1%
    
[libx264 @ 0x6d21600] i16 v,h,dc,p: 45% 24% 13% 18%
    
[libx264 @ 0x6d21600] i8c dc,h,v,p: 51% 20% 18% 11%
    
[libx264 @ 0x6d21600] kb/s:3945.79

  • 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 :

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