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  • FFMPEG frame counter hangs and stop streaming

    18 janvier 2021, par user2821178

    Good morning,

    


    I use a Raspberry, linked to an IP cam, in order to send the streaming to my Facebook Page.

    


    All works good, but it happen, that for some reason facebook stops to receive the streaming, but FFMPEG continues to works.

    


    I've noticed that even if FFMPEG seems to work correctly, the frame counter stops.

    


    This is the command :

    


        RTSP_URL="rtsp://xxxxxxxxxxx/videoMain";
YOUTUBE_URL="rtmps://live-api-s.facebook.com:443/rtmp/";
YOUTUBE_KEY="zzzzzzzzzxxxxxxxxyyyyyyyyyy";
LOGO="-i yyyyyyyyyyy.png -filter_complex overlay=x=1:y=(main_h-overlay_h)";
VIDEO="-s 512:288 -c:v libx264 -x264-params nal-hrd=cbr -b:v 150k -minrate 50k -maxrate 150k -bufsize 300k";
AUDIO="-c:a aac -strict experimental";
KEYFRAME="-g 100";
OUTPUTFORMAT="-f flv";

COMMAND="sudo ffmpeg -f lavfi -i anullsrc -rtsp_transport tcp -stimeout 5000000 -i ${RTSP_URL} ${LOGO} ${VIDEO} ${AUDIO} ${KEYFRAME} ${OUTPUTFORMAT} ${YOUTUBE_URL}/${YOUTUBE_KEY}";

$COMMAND > streamOut.txt 2>&1;


    


    Here an extract of the output :

    


    ffmpeg version N-96658-g3b860bfd6f Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1) 20170516
  configuration: --enable-gpl --enable-libx264 --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libspeex --enable-librtmp --enable-libtheora --enable-libvorbis --enable-nonfree --enable-version3 --enable-nonfree
  libavutil      56. 39.100 / 56. 39.100
  libavcodec     58. 68.100 / 58. 68.100
  libavformat    58. 38.100 / 58. 38.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 75.100 /  7. 75.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
Input #0, lavfi, from 'anullsrc':
  Duration: N/A, start: 0.000000, bitrate: 705 kb/s
    Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
[h264 @ 0x3415340] Missing reference picture, default is 65542
[h264 @ 0x3415340] Missing reference picture, default is 65544
[h264 @ 0x3415340] Missing reference picture, default is 65546
[h264 @ 0x3415340] Missing reference picture, default is 65548
[h264 @ 0x3415340] Missing reference picture, default is 65550
[h264 @ 0x3415340] Missing reference picture, default is 65552
[h264 @ 0x3415340] Missing reference picture, default is 65554
[h264 @ 0x3415340] Missing reference picture, default is 65556
[h264 @ 0x3415340] Missing reference picture, default is 65558
[h264 @ 0x3415340] Missing reference picture, default is 65560
[h264 @ 0x3415340] Missing reference picture, default is 65562
[h264 @ 0x3415340] Missing reference picture, default is 65564
[h264 @ 0x3415340] Missing reference picture, default is 65566
[h264 @ 0x3415340] Missing reference picture, default is 65568
[h264 @ 0x3415340] Missing reference picture, default is 65570
[h264 @ 0x3415340] Missing reference picture, default is 65572
[h264 @ 0x3415340] Missing reference picture, default is 65574
[h264 @ 0x3415340] Missing reference picture, default is 65576
[h264 @ 0x3415340] Missing reference picture, default is 65578
[h264 @ 0x3415340] Missing reference picture, default is 65580
[h264 @ 0x3415340] Missing reference picture, default is 65582
[h264 @ 0x3415340] Missing reference picture, default is 65584
[h264 @ 0x3415340] Missing reference picture, default is 65586
[h264 @ 0x3415340] Missing reference picture, default is 65588
[h264 @ 0x3415340] Missing reference picture, default is 65590
[h264 @ 0x3415340] Missing reference picture, default is 65592
Guessed Channel Layout for Input Stream #1.1 : mono
Input #1, rtsp, from 'rtsp://xxxxxxxxxxxxxxxx/videoMain':
  Metadata:
    title           : IP Camera Video
    comment         : videoMain
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #1:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 29.75 tbr, 90k tbn, 2108081.20 tbc
    Stream #1:1: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
Input #2, png_pipe, from 'zzzzzzzzzzz.png':
  Duration: N/A, bitrate: N/A
    Stream #2:0: Video: png, rgba(pc), 500x233 [SAR 3778:3778 DAR 500:233], 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #1:0 (h264) -> overlay:main (graph 0)
  Stream #2:0 (png) -> overlay:overlay (graph 0)
  overlay (graph 0) -> Stream #0:0 (libx264)
  Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
[rtsp @ 0x34127d0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
[h264 @ 0x34e0890] Missing reference picture, default is 65542
[h264 @ 0x3467ba0] Missing reference picture, default is 65544
[h264 @ 0x342e220] Missing reference picture, default is 65546
[h264 @ 0x35727c0] Missing reference picture, default is 65548
[h264 @ 0x34ffed0] Missing reference picture, default is 65550
[h264 @ 0x34e0890] Missing reference picture, default is 65552
[h264 @ 0x3467ba0] Missing reference picture, default is 65554
[h264 @ 0x342e220] Missing reference picture, default is 65556
[h264 @ 0x35727c0] Missing reference picture, default is 65558
[h264 @ 0x34ffed0] Missing reference picture, default is 65560
[h264 @ 0x34e0890] Missing reference picture, default is 65562
[h264 @ 0x3467ba0] Missing reference picture, default is 65564
[h264 @ 0x342e220] Missing reference picture, default is 65566
[h264 @ 0x35727c0] Missing reference picture, default is 65568
[h264 @ 0x34ffed0] Missing reference picture, default is 65570
[h264 @ 0x34e0890] Missing reference picture, default is 65572
[h264 @ 0x3467ba0] Missing reference picture, default is 65574
[h264 @ 0x342e220] Missing reference picture, default is 65576
[h264 @ 0x35727c0] Missing reference picture, default is 65578
[h264 @ 0x34ffed0] Missing reference picture, default is 65580
[h264 @ 0x34e0890] Missing reference picture, default is 65582
[h264 @ 0x3467ba0] Missing reference picture, default is 65584
[h264 @ 0x342e220] Missing reference picture, default is 65586
[h264 @ 0x35727c0] Missing reference picture, default is 65588
[h264 @ 0x34ffed0] Missing reference picture, default is 65590
[h264 @ 0x34e0890] Missing reference picture, default is 65592
frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
[libx264 @ 0x344a2b0] using SAR=1/1
[libx264 @ 0x344a2b0] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x344a2b0] profile High, level 2.1, 4:2:0, 8-bit
[libx264 @ 0x344a2b0] 264 - core 159 r2991 1771b55 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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=100 keyint_min=10 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=cbr mbtree=1 bitrate=150 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=150 vbv_bufsize=300 nal_hrd=cbr filler=1 ip_ratio=1.40 aq=1:1.00
Output #0, flv, to 'rtmps://live-api-s.facebook.com:443/rtmp//xzxzxxzxzxzxxzxzxzxzxxzxzxzxzxzx':
  Metadata:
    encoder         : Lavf58.38.100
    Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 512x288 [SAR 1:1 DAR 16:9], q=-1--1, 150 kb/s, 29.75 fps, 1k tbn, 29.75 tbc (default)
    Metadata:
      encoder         : Lavc58.68.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 150000/0/150000 buffer size: 300000 vbv_delay: N/A
    Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc58.68.100 aac
frame=   10 fps=9.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
frame=   22 fps= 14 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
frame=   34 fps= 16 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
frame=   45 fps= 17 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
frame=   52 fps= 16 q=29.0 size=      26kB time=00:00:01.85 bitrate= 116.1kbits/s speed=0.584x    
frame=   63 fps= 17 q=22.0 size=      29kB time=00:00:02.52 bitrate=  93.7kbits/s speed=0.68x    
......
...... 
frame=11279 fps= 14 q=20.0 size=   15356kB time=00:13:06.05 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11287 fps= 14 q=20.0 size=   15362kB time=00:13:06.58 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.967x    
frame=11295 fps= 14 q=23.0 size=   15373kB time=00:13:07.09 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.967x    
frame=11302 fps= 14 q=24.0 size=   15380kB time=00:13:07.55 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11309 fps= 14 q=23.0 size=   15386kB time=00:13:08.00 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11317 fps= 14 q=22.0 size=   15402kB time=00:13:08.50 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11325 fps= 14 q=23.0 size=   15408kB time=00:13:09.00 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11332 fps= 14 q=23.0 size=   15416kB time=00:13:09.48 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11340 fps= 14 q=21.0 size=   15454kB time=00:13:09.98 bitrate= 160.3kbits/s dup=0 drop=433 speed=0.966x    
frame=11348 fps= 14 q=21.0 size=   15459kB time=00:13:10.52 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.966x    
frame=11356 fps= 14 q=22.0 size=   15466kB time=00:13:11.02 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.966x    
frame=11364 fps= 14 q=21.0 size=   15472kB time=00:13:11.56 bitrate= 160.1kbits/s dup=0 drop=433 speed=0.966x    
frame=11372 fps= 14 q=21.0 size=   15477kB time=00:13:12.03 bitrate= 160.1kbits/s dup=0 drop=433 speed=0.966x    
frame=11380 fps= 14 q=21.0 size=   15488kB time=00:13:12.59 bitrate= 160.1kbits/s dup=0 drop=433 speed=0.966x    
frame=11388 fps= 14 q=21.0 size=   15493kB time=00:13:13.07 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
[rtsp @ 0x34127d0] CSeq 29 expected, 0 received.
    Last message repeated 1 times
frame=11396 fps= 14 q=22.0 size=   15500kB time=00:13:13.61 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
[rtsp @ 0x34127d0] CSeq 29 expected, 0 received.
    Last message repeated 3 times
frame=11404 fps= 14 q=20.0 size=   15507kB time=00:13:14.11 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
[rtsp @ 0x34127d0] CSeq 29 expected, 0 received.
    Last message repeated 4 times
frame=11412 fps= 14 q=23.0 size=   15520kB time=00:13:14.65 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
[rtsp @ 0x34127d0] CSeq 29 expected, 0 received.
frame=11419 fps= 14 q=20.0 size=   15527kB time=00:13:15.12 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
[rtsp @ 0x34127d0] CSeq 29 expected, 0 received.
    Last message repeated 1 times
frame=11424 fps= 14 q=20.0 size=   15534kB time=00:13:15.46 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11431 fps= 14 q=22.0 size=   15540kB time=00:13:15.86 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11439 fps= 14 q=21.0 size=   15579kB time=00:13:16.37 bitrate= 160.3kbits/s dup=0 drop=433 speed=0.966x    
frame=11446 fps= 14 q=21.0 size=   15583kB time=00:13:16.80 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.966x    
......
...... 
frame=11811 fps= 14 q=21.0 size=   16022kB time=00:13:40.33 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11819 fps= 14 q=21.0 size=   16031kB time=00:13:40.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11827 fps= 14 q=21.0 size=   16041kB time=00:13:41.37 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.966x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.965x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.965x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.964x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.964x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.963x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.962x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.962x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.961x    
frame=11834 fps= 14 q=25.0 size=   16052kB time=00:13:41.84 bitrate= 160.0kbits/s dup=0 drop=433 speed=0.961x    
frame=11835 fps= 14 q=21.0 size=   16076kB time=00:13:41.91 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.96x    
frame=11835 fps= 14 q=21.0 size=   16076kB time=00:13:41.91 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.96x    
frame=11835 fps= 14 q=21.0 size=   16076kB time=00:13:41.91 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.959x    
frame=11835 fps= 14 q=21.0 size=   16076kB time=00:13:41.91 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.959x    
frame=11835 fps= 14 q=21.0 size=   16076kB time=00:13:41.91 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.958x    
frame=11835 fps= 14 q=21.0 size=   16076kB time=00:13:41.91 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.957x    
frame=11835 fps= 14 q=21.0 size=   16076kB time=00:13:41.91 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.957x    
frame=11835 fps= 14 q=21.0 size=   16076kB time=00:13:41.91 bitrate= 160.2kbits/s dup=0 drop=433 speed=0.956x    
......
...... 
frame=11839 fps=9.0 q=22.0 size=   23189kB time=02:16:02.34 bitrate=  23.3kbits/s dup=0 drop=433 speed=6.22x    
frame=11839 fps=9.0 q=22.0 size=   23197kB time=02:16:10.66 bitrate=  23.3kbits/s dup=0 drop=433 speed=6.22x    
frame=11839 fps=9.0 q=22.0 size=   23205kB time=02:16:18.92 bitrate=  23.2kbits/s dup=0 drop=433 speed=6.23x    
frame=11839 fps=9.0 q=22.0 size=   23213kB time=02:16:27.19 bitrate=  23.2kbits/s dup=0 drop=433 speed=6.23x    
frame=11839 fps=9.0 q=22.0 size=   23221kB time=02:16:35.34 bitrate=  23.2kbits/s dup=0 drop=433 speed=6.23x    
frame=11839 fps=9.0 q=22.0 size=   23229kB time=02:16:43.67 bitrate=  23.2kbits/s dup=0 drop=433 speed=6.24x    
frame=11839 fps=9.0 q=22.0 size=   23237kB time=02:16:51.89 bitrate=  23.2kbits/s dup=0 drop=433 speed=6.24x    
frame=11839 fps=9.0 q=22.0 size=   23245kB time=02:17:00.12 bitrate=  23.2kbits/s dup=0 drop=433 speed=6.25x    
frame=11839 fps=9.0 q=22.0 size=   23253kB time=02:17:08.43 bitrate=  23.2kbits/s dup=0 drop=433 speed=6.25x    



    


    There is a way to stops FFMPEG when this happen ?

    


    Thanks !

    


  • ffmpeg is detecting a shorter stream duration than my video player is causing encoding to stop too early

    20 novembre 2019, par Kabir

    I have an mp4 that was saved from corruption using recover_mp4

    The audio, however was ruined (but that’s ok) and the duration of the file is 34 hours long (it’s supposed to be closer to 8h 30m). When I open the video in mpv I can scrub through and watch the video (all 8 hours and 30 minutes are there, normal playback) and the rest of the time is just a black screen.

    So in an effort to extract the video I ran it though ffmpeg with the following :

    ffmpeg -i input.mp4 -an -c:v libx264 -crf 18 -preset slow -f mp4 output.mp4

    But after 5h30m ffmpeg just stopped. No errors, it was just done. So I went back in with this command to see what was wrong :

    ffmpeg -loglevel verbose -ss 05:30:00 -t 00:03:00 -i input.mp4 -an -c copy output.mp4

    Which gives me the following log and tells me "No more output streams to write to, finishing."

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'J:\Projects\Recovered\input.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.20.100
    
  Duration: 34:28:24.70, start: 0.000000, bitrate: 9807 kb/s
    
    Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt470bg/bt709/bt709, left), 1920x1080 (1920x1088) [SAR 1:1 DAR 16:9], 38945 kb/s, 60 fps, 60 tbr, 15360 tbn, 120 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 67 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Output #0, mp4, to 'J:\Projects\Recovered\output.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.22.100
    
    Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt470bg/bt709/bt709, left), 1920x1080 (0x0) [SAR 1:1 DAR 16:9], q=2-31, 38945 kb/s, 60 fps, 60 tbr, 15360 tbn, 15360 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
Press [q] to stop, [?] for help
    
No more output streams to write to, finishing.e=00:02:58.31 bitrate=47090.3kbits/s speed=4.82x     125x
    
frame=10921 fps=292 q=-1.0 Lsize= 1035963kB time=00:02:59.98 bitrate=47152.2kbits/s speed=4.81x
    
video:1035907kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005471%
    
Input file #0 (J:\Projects\Recovered\input.mp4):
    
  Input stream #0:0 (video): 10922 packets read (1060899674 bytes);
    
  Input stream #0:1 (audio): 0 packets read (0 bytes);
    
  Total: 10922 packets (1060899674 bytes) demuxed
    
Output file #0 (J:\Projects\Recovered\output.mp4):
    
  Output stream #0:0 (video): 10921 packets muxed (1060768411 bytes);
    
  Total: 10921 packets (1060768411 bytes) muxed
    
[AVIOContext @ 000001d426143200] Statistics: 2 seeks, 4050 writeouts
    
[AVIOContext @ 000001d426143e80] Statistics: 1130774976 bytes read, 1 seeks

    SO now I’m confused, the input file plays back all 8 hours if I open in it my video viewer, but ffmpeg is detecting a shorter video stream than is really on there. Here is the log I get from checking stream duration :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'J:\Projects\Recovered\input.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.20.100
    
  Duration: 34:28:24.70, start: 0.000000, bitrate: 9807 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt470bg/bt709/bt709), 1920x1080 [SAR 1:1 DAR 16:9], 38945 kb/s, 60 fps, 60 tbr, 15360 tbn, 120 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 67 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
stream|duration=20111.950000
    
stream|duration=20111.915000

    So it’s detecting a duration of about 5h30m according to that. I’m not really sure what next steps I should take from here or why ffmpeg is telling me my streams are shorter than they really are. Any help would be appreciated !

  • Monitoring ffmpeg two-passes encoding

    31 décembre 2024, par Hodol

    I'm new in FFMPEG.

    


    According to the official guide, https://trac.ffmpeg.org/wiki/Encode/VP9 I use the following command to convert a large h.264 file :

    


    ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 0 -crf 30 -pass 1 -an -f null /dev/null
ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 0 -crf 30 -pass 2 -c:a libopus output.webm


    


    However, the pass-1 takes too long time and it does not log progress. With -report option I can see something is in progress but I don't know how long I should wait.

    


    Here's questions :

    


      

    1. Is there any way to see the progress of 1-pass ?

      2. 


    2. Is there any way to speed up the process ?

      3. 


    


    Thank you,

    


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