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  • video after ffmpeg command conversion is not playing on windows

    10 décembre 2015, par Hemant Kumar

    I am stuck at a very weird and complex problem, hoping if anyone know the solution :

    I am converting user uploaded video using ffmpeg command on server and it was working fine as well. Today I found that if a video is recorded by a webcam from windows, is playing well in linux as well as on windows where as if user is creating a video by webcam from linux, is playing only on linux (any browser). On window it’s screen either show loading icon or black screen while audio is working fine.

    I am using following codec :

    ['-strict', '-2', '-preset slow', '-maxrate 500k', '-bufsize 1000k', vfOption, '-threads 0', '-ab 64k', '-movflags faststart','-vf scale=-1:480', '-metadata:s:v:0 rotate=0', '-vcodec libx264']

    I work on linux and using html5 player on my website. I am converting video in mp4 format.

    Input :

    ffmpeg -i /<server path="path">/stream_FE2AF05B-E630-1F7B-390B-37325B31B362.flv -strict -2 -vcodec libx264 -preset slow -vb 500k -maxrate 500k -bufsize 1000k -vf 'scale=-1:480 ' -threads 0 -ab 64k -s 640x480 -movflags faststart -metadata:s:v:0 rotate=0 /<server path="path">/testing.mp4
    
</server></server>

    Output :

    ffmpeg version 2.2.5 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Aug  1 2014 09:24:02 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
    
  configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libtheora --enable-libx264 --enable-libvpx --enable-libmp3lame
    
  libavutil      52. 66.100 / 52. 66.100
    
  libavcodec     55. 52.102 / 55. 52.102
    
  libavformat    55. 33.100 / 55. 33.100
    
  libavdevice    55. 10.100 / 55. 10.100
    
  libavfilter     4.  2.100 /  4.  2.100
    
  libswscale      2.  5.102 /  2.  5.102
    
  libswresample   0. 18.100 /  0. 18.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, flv, from '/<server path="path">/stream_FE2AF05B-E630-1F7B-390B-37325B31B362.flv':
    
  Metadata:
    
    canSeekToEnd    : true
    
  Duration: 00:00:04.04, start: 0.000000, bitrate: 636 kb/s
    
    Stream #0:0: Video: flv1, yuv420p, 640x480, 1k tbr, 1k tbn, 1k tbc
    
    Stream #0:1: Audio: nellymoser, 44100 Hz, mono, flt
    
[libx264 @ 0x23c5340] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 0x23c5340] profile High, level 5.2
    
[libx264 @ 0x23c5340] 264 - core 142 r2453 ea0ca51 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x113 me=umh subme=8 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=24 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=cbr mbtree=1 bitrate=500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=500 vbv_bufsize=1000 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to '/<server path="path">/testing.mp4':
    
  Metadata:
    
    canSeekToEnd    : true
    
    encoder         : Lavf55.33.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x480, q=-1--1, 500 kb/s, 16k tbn, 1k tbc
    
    Metadata:
    
      rotate          : 0
    
    Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 64 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (flv -> libx264)
    
  Stream #0:1 -> #0:1 (nellymoser -> aac)
    
Press [q] to stop, [?] for help
    
[mp4 @ 0x23c0200] Starting second pass: moving the moov atom to the beginning of the file2 drop=0    
    
frame= 4020 fps=706 q=-1.0 Lsize=     355kB time=00:00:04.08 bitrate= 712.0kbits/s dup=3931 drop=0    
    
video:271kB audio:32kB subtitle:0 data:0 global headers:0kB muxing overhead 16.957901%
    
[libx264 @ 0x23c5340] frame I:17    Avg QP:27.55  size:  7119
    
[libx264 @ 0x23c5340] frame P:1013  Avg QP:25.37  size:    88
    
[libx264 @ 0x23c5340] frame B:2990  Avg QP:27.32  size:    22
    
[libx264 @ 0x23c5340] consecutive B-frames:  0.8%  0.0%  0.1% 99.1%
    
[libx264 @ 0x23c5340] mb I  I16..4: 42.0% 55.1%  2.9%
    
[libx264 @ 0x23c5340] mb P  I16..4:  0.3%  0.4%  0.0%  P16..4:  0.6%  0.1%  0.0%  0.0%  0.0%    skip:98.6%
    
[libx264 @ 0x23c5340] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.2%  0.0%  0.0%  direct: 0.0%  skip:99.8%  L0:35.7% L1:64.3% BI: 0.0%
    
[libx264 @ 0x23c5340] 8x8 transform intra:55.0% inter:84.5%
    
[libx264 @ 0x23c5340] direct mvs  spatial:87.6% temporal:12.4%
    
[libx264 @ 0x23c5340] coded y,uvDC,uvAC intra: 33.4% 51.9% 0.7% inter: 0.0% 0.1% 0.0%
    
[libx264 @ 0x23c5340] i16 v,h,dc,p: 26% 54% 15%  5%
    
[libx264 @ 0x23c5340] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 16% 53%  3%  1%  2%  2%  3%  3%
    
[libx264 @ 0x23c5340] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 20% 13% 14%  5%  7%  7% 11%  8%
    
[libx264 @ 0x23c5340] i8c dc,h,v,p: 43% 31% 23%  3%
    
[libx264 @ 0x23c5340] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x23c5340] ref P L0: 80.9%  9.0%  6.9%  2.6%  0.7%
    
[libx264 @ 0x23c5340] ref B L0: 89.4%  8.6%  1.8%  0.2%
    
[libx264 @ 0x23c5340] ref B L1: 91.0%  9.0%
    
[libx264 @ 0x23c5340] kb/s:551.72
    
</server></server>

    Outout from file recorded on window :

    Input :

    ffmpeg -i /<server path="path">/stream_window.flv -strict -2 -vcodec libx264 -preset slow -vb 500k -maxrate 500k -bufsize 1000k -vf 'scale=-1:480 ' -threads 0 -ab 64k -s 640x480 -movflags faststart -metadata:s:v:0 rotate=0 /<server path="path">/testing_1.mp4
    
</server></server>

    Output :

    ffmpeg version 2.2.5 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Aug  1 2014 09:24:02 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
    
  configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libtheora --enable-libx264 --enable-libvpx --enable-libmp3lame
    
  libavutil      52. 66.100 / 52. 66.100
    
  libavcodec     55. 52.102 / 55. 52.102
    
  libavformat    55. 33.100 / 55. 33.100
    
  libavdevice    55. 10.100 / 55. 10.100
    
  libavfilter     4.  2.100 /  4.  2.100
    
  libswscale      2.  5.102 /  2.  5.102
    
  libswresample   0. 18.100 /  0. 18.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, flv, from '/<server path="path">/stream_window.flv':
    
  Metadata:
    
    canSeekToEnd    : true
    
  Duration: 00:00:09.22, start: 0.000000, bitrate: 420 kb/s
    
    Stream #0:0: Video: flv1, yuv420p, 640x480, 1k tbr, 1k tbn, 1k tbc
    
    Stream #0:1: Audio: nellymoser, 44100 Hz, mono, flt
    
[libx264 @ 0x1e09fc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 0x1e09fc0] profile High, level 5.2
    
[libx264 @ 0x1e09fc0] 264 - core 142 r2453 ea0ca51 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x113 me=umh subme=8 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=24 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=cbr mbtree=1 bitrate=500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=500 vbv_bufsize=1000 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to '/<server path="path">/testing_1.mp4':
    
  Metadata:
    
    canSeekToEnd    : true
    
    encoder         : Lavf55.33.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x480, q=-1--1, 500 kb/s, 16k tbn, 1k tbc
    
    Metadata:
    
      rotate          : 0
    
    Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 64 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (flv -> libx264)
    
  Stream #0:1 -> #0:1 (nellymoser -> aac)
    
Press [q] to stop, [?] for help
    
[mp4 @ 0x1e06220] Starting second pass: moving the moov atom to the beginning of the file7 drop=0    
    
frame= 8936 fps=703 q=-1.0 Lsize=     771kB time=00:00:09.26 bitrate= 681.5kbits/s dup=8907 drop=0    
    
video:585kB audio:73kB subtitle:0 data:0 global headers:0kB muxing overhead 17.106213%
    
[libx264 @ 0x1e09fc0] frame I:40    Avg QP:29.54  size:  7449
    
[libx264 @ 0x1e09fc0] frame P:2248  Avg QP:30.88  size:    69
    
[libx264 @ 0x1e09fc0] frame B:6648  Avg QP:39.17  size:    22
    
[libx264 @ 0x1e09fc0] consecutive B-frames:  0.8%  0.0%  0.1% 99.1%
    
[libx264 @ 0x1e09fc0] mb I  I16..4: 36.8% 60.7%  2.5%
    
[libx264 @ 0x1e09fc0] mb P  I16..4:  0.2%  0.3%  0.0%  P16..4:  0.4%  0.0%  0.0%  0.0%  0.0%    skip:98.9%
    
[libx264 @ 0x1e09fc0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.2%  0.0%  0.0%  direct: 0.0%  skip:99.8%  L0:34.2% L1:65.8% BI: 0.0%
    
[libx264 @ 0x1e09fc0] 8x8 transform intra:60.6% inter:87.6%
    
[libx264 @ 0x1e09fc0] direct mvs  spatial:72.8% temporal:27.2%
    
[libx264 @ 0x1e09fc0] coded y,uvDC,uvAC intra: 36.3% 62.8% 4.7% inter: 0.0% 0.0% 0.0%
    
[libx264 @ 0x1e09fc0] i16 v,h,dc,p: 33% 46% 15%  7%
    
[libx264 @ 0x1e09fc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 19% 46%  3%  1%  1%  1%  2%  4%
    
[libx264 @ 0x1e09fc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 17% 14%  9%  4%  4%  5%  5%  7%
    
[libx264 @ 0x1e09fc0] i8c dc,h,v,p: 42% 31% 23%  4%
    
[libx264 @ 0x1e09fc0] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x1e09fc0] ref P L0: 82.6%  9.9%  5.2%  1.7%  0.5%
    
[libx264 @ 0x1e09fc0] ref B L0: 87.1% 11.0%  1.4%  0.4%
    
[libx264 @ 0x1e09fc0] ref B L1: 90.3%  9.7%
    
[libx264 @ 0x1e09fc0] kb/s:536.03
    
</server></server>

    Can anyone figure what could be the problem ?

    @LordNeckbeard : Please find the command and its output above. Thanks

  • Reduce latency in ffmpeg snapshot

    3 décembre 2015, par Acorian0

    I have a latency problem with FFMPEG.

    I have a streaming server running and I occasionally need to take multiple snapshots over a period of time (in the example below, 5s), and then examine the snapshots taken. Time is critical.

    With this command I take 25 frames per second over 5 seconds, meaning I will have 125 snapshots in my folder.

    ffmpeg.exe -ss 0.05 -re -i udp://239.255.0.xx:xxxx -ss 0 -vf fps=25 -to 5 -y \Test\%5d.jpg

    The -vf fps is forcing the 25 frames per second even if the server can’t provide them.

    The problem is that -ss 0.05 is not doing its job. It is supposed to delay the initial snapshot for 50 milliseconds but FFMPEG takes around 200ms to "start" the service on itself :/. This means the first snapshot is taken after around 200ms after I called the service. (200ms is way too big of a latency for my purpose... I can survive with 100ms)

    How can I force FFMPEG to start taking snapshots earlier ? Or is there a way to get snapshots, let’s say, from the buffer (e.g. start taking snapshots 150ms in the past) ?

    PS : Changing the -ss from 0.05 to 0.00 is not doing anything, I can only see the -ss doing something if the value is bigger than 0.2/0.25. Another thing, using a newer version of FFMPEG is by now impossible

    Sample OUTPUT :

    ffmpeg version 2.4.5 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Dec 30 2014 14:53:50 with gcc 4.9.2 (GCC)
    
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32thread
    
s --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-icon
    
v --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable
    
-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencor
    
e-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-l
    
ibschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-li
    
bvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-l
    
ibwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --ena
    
ble-lzma --enable-decklink --enable-zlib
    
  libavutil      54.  7.100 / 54.  7.100
    
  libavcodec     56.  1.100 / 56.  1.100
    
  libavformat    56.  4.101 / 56.  4.101
    
  libavdevice    56.  0.100 / 56.  0.100
    
  libavfilter     5.  1.100 /  5.  1.100
    
  libswscale      3.  0.100 /  3.  0.100
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  0.100 / 53.  0.100
    
[mpeg2video @ 01d77120] Invalid frame dimensions 0x0.
    
Input #0, mpegts, from 'udp://239.255.0.14:5014':
    
  Duration: N/A, start: 159.051978, bitrate: 105241 kb/s
    
  Program 1
    
    Metadata:
    
      service_name    : Service01
    
      service_provider: FFmpeg
    
    Stream #0:0[0x100]: Video: mpeg1video ([2][0][0][0] / 0x0002), yuv420p(tv), 1920x1080 [SAR 1:1 D
    
AR 16:9], 104857 kb/s, 50 tbr, 90k tbn, 50 tbc
    
    Stream #0:1[0x101]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 384 kb/s
    
[swscaler @ 01d70060] deprecated pixel format used, make sure you did set range correctly
    
Output #0, image2, to 'C:\Test\%5d.jpg':
    
  Metadata:
    
    encoder         : Lavf56.4.101
    
    Stream #0:0: Video: mjpeg, yuvj420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25
    
tbn, 25 tbc
    
    Metadata:
    
      encoder         : Lavc56.1.100 mjpeg
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mpeg1video (native) -> mjpeg (native))
    
Press [q] to stop, [?] for help
    
frame=  125 fps= 25 q=24.8 Lsize=N/A time=00:00:05.00 bitrate=N/A dup=1 drop=0
    
video:9710kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

  • Revision 93139 : [Salvatore] [source:_plugins_/yaml/lang/ paquet-yaml] Export depuis ...

    24 novembre 2015, par spip@… — Log

    [Salvatore] paquet-yaml Export depuis ​http://trad.spip.net de la langue nl

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