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  • FFMPEG creates incorrect Source duration

    4 août 2016, par Byron Whitlock

    When transcoding movies from an AVI to mp4 sometimes FFMPEG sets the "Source Duration" incorrectly.

    This messes up playback on IOS devices. Specifically, it causes the video to cut out at "Source duration" while the audio still plays.

    enter image description here

    FFMPEG output transcode doesn’t’ show anything odd at all. Looks normal, no errors or warnings.

    • Can I force FFMPEG to never add the "Source Duration" metadata ?
    • How do I edit the track metadata shown by mediainfo ? I tried Mp4box, and a few others, but I can’t seem to figure out how to edit track level metadata.

    Thanks.

    Log is below.

    ffmpeg version N-77455-g4707497 Copyright (c) 2000-2015 the FFmpeg developers   built with gcc 5.2.0 (GCC)   configuration: --enable-gpl
    
    --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib   libavutil      55. 11.100 / 55. 11.100   libavcodec     57. 20.100 / 57. 20.100   libavformat    57. 20.100 / 57. 20.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6. 21.101 / 
    
    6. 21.101   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.101 /  2.  0.101   libpostproc    54.  0.100 / 54.  0.100 Input #0, avi, from 'E:\MEDIA\Central.Intelligence.2016.HC.HDRip.XviD.AC3-EVO\Central.Intelligence.2016.HC.HDRip.XviD.AC3-EVO.avi': Metadata:
    
        encoder         : VirtualDubMod 1.5.10.2 (build 2542/release)   Duration: 01:51:43.27, start: 0.000000, bitrate: 1765 kb/s
    
        Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 720x304 [SAR 1:1 DAR 45:19], 1563 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
    
        Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s [libx264 @ 000000f3c80a0a80] using SAR=405/304 [libx264 @ 000000f3c80a0a80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2 [libx264 @ 000000f3c80a0a80] profile High, level 3.1 [libx264 @ 000000f3c80a0a80] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=1280 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'F:\STREAMS\Central.Intelligence.2016.HC.HDRip.XviD.AC3-EVO.avi.1280x720_1000kbps.TEMP.mp4': Metadata:
    
        encoder         : Lavf57.20.100
    
        Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 405:304 DAR 45:19], q=-1--1, 1280 kb/s, 23.98 fps, 10000k tbn, 23.98 tbc
    
        Metadata:
    
          encoder         : Lavc57.20.100 libx264
    
        Side data:
    
          unknown side data type 10 (24 bytes)
    
        Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 160 kb/s
    
        Metadata:
    
          encoder         : Lavc57.20.100 aac Stream mapping:   Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))   Stream #0:1 -> #0:1 (ac3 (native) -> aac (native)) Press [q] to stop, [?] for help [mpeg4 @ 000000f3c80ae220] Video uses a non-standard and wasteful way to store B-frames ('packed B-frames'). Consider using the mpeg4_unpack_bframes bitstream filter without encoding but stream copy to fix it. 
    
frame=   15 fps=0.0 q=0.0 size=       0kB time=00:00:01.18 bitrate=   0.3kbits/s dup=1 drop=0 speed=2.36x   
    
--SNIP---
    
frame=160704 fps= 16 q=30.0 size= 1180376kB time=01:51:43.08 bitrate=1442.6kbits/s dup=1 drop=0 speed=0.671x     
    
[libx264 @ 0000001f60c5d900] frame I:1167  Avg QP:19.08  size: 44465
    
[libx264 @ 0000001f60c5d900] frame P:63049 Avg QP:22.26  size: 12774
    
[libx264 @ 0000001f60c5d900] frame B:110691 Avg QP:24.81  size:  2739
    
[libx264 @ 0000001f60c5d900] consecutive B-frames:  6.0% 22.8% 18.3% 53.0%
    
[libx264 @ 0000001f60c5d900] mb I  I16..4: 14.0% 76.1%  9.9%
    
[libx264 @ 0000001f60c5d900] mb P  I16..4:  2.5%  6.6%  0.4%  P16..4: 44.5% 10.8%  5.2%  0.0%  0.0%    skip:30.0%
    
[libx264 @ 0000001f60c5d900] mb B  I16..4:  0.1%  0.3%  0.0%  B16..8: 32.1%  1.6%  0.2%  direct: 0.9%  skip:64.9%  L0:37.9% L1:58.7% BI: 3.5%
    
[libx264 @ 0000001f60c5d900] final ratefactor: 23.25
    
[libx264 @ 0000001f60c5d900] 8x8 transform intra:70.8% inter:85.8%
    
[libx264 @ 0000001f60c5d900] coded y,uvDC,uvAC intra: 47.1% 56.6% 19.5% inter: 10.7% 14.2% 0.4%
    
[libx264 @ 0000001f60c5d900] i16 v,h,dc,p: 46% 20%  8% 26%
    
[libx264 @ 0000001f60c5d900] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 17% 25%  5%  7%  7%  7%  6%  6%
    
[libx264 @ 0000001f60c5d900] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 20% 12%  5% 10%  9%  8%  5%  4%
    
[libx264 @ 0000001f60c5d900] i8c dc,h,v,p: 58% 18% 18%  6%
    
[libx264 @ 0000001f60c5d900] Weighted P-Frames: Y:1.4% UV:0.8%
    
[libx264 @ 0000001f60c5d900] ref P L0: 62.6% 12.9% 18.9%  5.6%  0.1%
    
[libx264 @ 0000001f60c5d900] ref B L0: 87.6% 11.0%  1.4%
    
[libx264 @ 0000001f60c5d900] ref B L1: 94.6%  5.4%
    
[libx264 @ 0000001f60c5d900] kb/s:1272.59
    
[aac @ 0000001f60b52180] Qavg: 954.859

    Edit

    This has something to do with data, when I run this command (cut at 10 minutes)

    ffmpeg.exe -i CI.mp4 -ss 00:00:00 -t 00:08:00 -vcodec copy  -map_metadata 0 -acodec copy CI2.mp4

    Mediainfo shows

    Duration                    : 9mn 49s
    
Source duration             : 2mn 40s

    When I run this one (18 minutes)

    ffmpeg.exe -i CI.mp4 -ss 00:00:00 -t 00:18:00 -vcodec copy  -map_metadata 0 -acodec copy CI2.mp4

    Mediainfo shows

    Duration                    : 17mn 49s
    
Source duration             : 3mn 30s

    How can I edit the metadata directly

  • capture RTSP stream from IP camera ffmpeg

    11 août 2016, par kranthi sai

    I used the following command to get the frames from RTSP h264 codec. I could not able to get the frames from the ip camera.

    $ ffmpeg -i rtsp://xxxx:yyy@192.168.1.yy:xx/tcp/av0_0 -f image2 -vf fps=fps=1/120 img%03d.jpg

    My output

    ffmpeg version 3.1.1 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1) 
    

    
  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --disable-yasm
    

    
  libavutil      55. 28.100 / 55. 28.100
    

    
  libavcodec     57. 48.101 / 57. 48.101
    

    
  libavformat    57. 41.100 / 57. 41.100
    

    
  libavdevice    57.  0.101 / 57.  0.101
    

    
  libavfilter     6. 47.100 /  6. 47.100
    

    
  libswscale      4.  1.100 /  4.  1.100
    

    
  libswresample   2.  1.100 /  2.  1.100
    

    
  libpostproc    54.  0.100 / 54.  0.100
    

    
[rtsp @ 0x2dba3a0] CSeq 6 expected, 0 received.
    
    Last message repeated 5 times
    

    
[rtsp @ 0x2dba3a0] Could not find codec parameters for stream 0 (Video: h264, none): unspecified size
    

    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    

    
Guessed Channel Layout for Input Stream #0.1 : mono
    
Input #0, rtsp, from 
    
'rtsp://xx:yy@192.168.1.xx:yy/tcp/av0_0':
    

    
  Metadata:
    

    
    title           : streamed by the RTSP server
    

    
  Duration: N/A, start: 0.000000, bitrate: 64 kb/s
    

    
    Stream #0:0: Video: h264, none, 90k tbr, 90k tbn, 180k tbc
    

    
    Stream #0:1: Audio: pcm_alaw, 8000 Hz, 1 channels, s16, 64 kb/s
    

    
Output #0, image2, to 'img%03d.jpg':
    

    
Output file #0 does not contain any stream
    

    
Exiting normally, received signal 2.

  • FFmpeg for marking time video based on a reference date

    3 août 2016, par Denio Mariz

    I am trying to mark a timestamp in a video using Drawtext filter.
    FFmpeg easily marks timestamps based on localtime, gmtime or even PTS. However, I want to assign a reference time (start time) for the timestamp in order to represent the time the video was recorded (not encoded).

    Reading the documentation, I found that option "basetime" can be used for this purpose. However it seems that is not working or I am missing something.

    The command line I am using is :

    ffmpeg -y -i input.mp4 -filter_complex drawtext="fontfile=/tmp/UbuntuMono-B.ttf: fontsize=36: fontcolor=yellow: box=1: boxcolor=black@0.4: text='Wall Clock Time\: %{gmtime\:%Y-%m-%d %T}': basetime=1456007118" output.mp4

    By using basetime=1456007118", it was expected the start time was set to ’02/20/2016 20:25:18’ since 1456007118 is the UTC time for that time and date :

    date -d '02/20/2016 20:25:18' +"%s" # format MM/DD/AAAA hh:mm:ss
    
1456007118

    However, no error is issued by FFMpeg and the video is marked with current GMT, ignoring "basetime" option.

    Any hint ?
    Thanks.

    Complete information about FFmpeg version and output is :

       ffmpeg -y -i /home/denio/Videos/Interstellar_2014_Trailer_4_5.1-1080p-HDTN.mp4 -filter_complex drawtext="fontfile=/tmp/UbuntuMono-B.ttf: fontsize=36: fontcolor=yellow: box=1: boxcolor=black@0.4: text='Wall Clock Time\: %{gmtime\:%Y-%m-%d %T}': basetime=1470226363" /tmp/x.mp4
       ffmpeg version 3.1.1 Copyright (c) 2000-2016 the FFmpeg developers
         built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2.1) 20160413
         configuration: --enable-libxavs --enable-bzlib --enable-libfaac --enable-libfreetype --enable-libfontconfig --enable-libmp3lame --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-zlib --enable-x11grab --enable-static --enable-pthreads --enable-gpl --enable-nonfree --enable-version3 --disable-ffserver --enable-libgsm --enable-librtmp --enable-libvpx --enable-libschroedinger --enable-libopencore-amrnb --enable-libopenjpeg
         libavutil      55. 28.100 / 55. 28.100
         libavcodec     57. 48.101 / 57. 48.101
         libavformat    57. 41.100 / 57. 41.100
         libavdevice    57.  0.101 / 57.  0.101
         libavfilter     6. 47.100 /  6. 47.100
         libswscale      4.  1.100 /  4.  1.100
         libswresample   2.  1.100 /  2.  1.100
         libpostproc    54.  0.100 / 54.  0.100
       ...
       ...

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