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  • FFMPEG - Concatenate 2 MP4 Files, one has video and audio and the other has only audio

    5 août 2016, par Avi

    I am trying to merge 2 mp4 files using FFMPEG. One of these files has both video and audio (track1.mp4), while the other one has only audio (track2.mp4). The names of these files are listed in a text file called 'filesToMerge.txt' in the following manner :

    file 'track1.mp4'
    
file 'track2.mp4'

    I then execute the following ffmpeg command to merge them.

    ffmpeg -f concat -i filesToMerge.txt -c copy output.mp4

    However, the concatenated file that is generated consists of only the first file that is listed in filesToMerge.txt. That is, if track1.mp4 (which has both video and audio) is the first file in the list, then only that file makes up output.mp4 (the concatenated file produced) and vice versa.

    I would like for both files to be in output.mp4. I am using Ubuntu 14.04 (if that helps). How can I solve this problem ?

    When I run this command
    ffmpeg -i track1.mp4 -i track2.mp4 output.mp4
    I get the following

    ffmpeg version N-76944-g15206ff Copyright (c) 2000-2015 the FFmpeg developers
    
      built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
    
      configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
    
      libavutil      55.  9.100 / 55.  9.100
    
      libavcodec     57. 16.101 / 57. 16.101
    
      libavformat    57. 19.100 / 57. 19.100
    
      libavdevice    57.  0.100 / 57.  0.100
    
      libavfilter     6. 17.100 /  6. 17.100
    
      libavresample   3.  0.  0 /  3.  0.  0
    
      libswscale      4.  0.100 /  4.  0.100
    
      libswresample   2.  0.101 /  2.  0.101
    
      libpostproc    54.  0.100 / 54.  0.100
    
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'track1.mp4':
    
      Metadata:
    
        major_brand     : isom
    
        minor_version   : 512
    
        compatible_brands: isomiso2avc1mp41
    
        encoder         : Lavf56.40.101
    
      Duration: 00:00:10.76, start: 0.023220, bitrate: 351 kb/s
    
        Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 800x400 [SAR 400:533 DAR 800:533], 181 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
        Metadata:
    
          handler_name    : VideoHandler
    
        Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 194 kb/s (default)
    
        Metadata:
    
          handler_name    : SoundHandler
    
    Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'track2.mp4':
    
      Metadata:
    
        major_brand     : isom
    
        minor_version   : 512
    
        compatible_brands: isomiso2mp41
    
        creation_time   : 1970-01-01 00:00:00
    
        encoder         : Lavf52.32.0
    
      Duration: 00:00:32.21, start: 0.000000, bitrate: 46 kb/s
    
        Stream #1:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 43 kb/s (default)
    
        Metadata:
    
          creation_time   : 1970-01-01 00:00:00
    
          handler_name    : SoundHandler
    
    [libx264 @ 0x3950ce0] using SAR=400/533
    
    [libx264 @ 0x3950ce0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
    
    [libx264 @ 0x3950ce0] profile High, level 3.0
    
    [libx264 @ 0x3950ce0] 264 - core 142 r2491 24e4fed - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=1 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=25 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
    
    Output #0, mp4, to 'output.mp4':
    
      Metadata:
    
        major_brand     : isom
    
        minor_version   : 512
    
        compatible_brands: isomiso2avc1mp41
    
        encoder         : Lavf57.19.100
    
        Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 800x400 [SAR 400:533 DAR 800:533], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
        Metadata:
    
          handler_name    : VideoHandler
    
          encoder         : Lavc57.16.101 libx264
    
        Stream #0:1(und): Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s (default)
    
        Metadata:
    
          handler_name    : SoundHandler
    
          encoder         : Lavc57.16.101 libfdk_aac
    
    Stream mapping:
    
      Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
      Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
    
    Press [q] to stop, [?] for help
    
    frame=  270 fps= 99 q=28.0 Lsize=     382kB time=00:00:10.72 bitrate= 291.9kbits/s dup=1 drop=0    
    
    video:230kB audio:143kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.482656%
    
    [libx264 @ 0x3950ce0] frame I:2     Avg QP:18.87  size:109452
    
    [libx264 @ 0x3950ce0] frame P:68    Avg QP:15.09  size:   171
    
    [libx264 @ 0x3950ce0] frame B:200   Avg QP:23.33  size:    23
    
    [libx264 @ 0x3950ce0] consecutive B-frames:  1.1%  0.0%  1.1% 97.8%
    
    [libx264 @ 0x3950ce0] mb I  I16..4: 11.0% 39.6% 49.5%
    
    [libx264 @ 0x3950ce0] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  5.9%  0.1%  0.0%  0.0%  0.0%    skip:93.9%
    
    [libx264 @ 0x3950ce0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.3%  0.0%  0.0%  direct: 0.0%  skip:99.7%  L0:21.8% L1:78.2% BI: 0.0%
    
    [libx264 @ 0x3950ce0] 8x8 transform intra:39.7% inter:92.8%
    
    [libx264 @ 0x3950ce0] coded y,uvDC,uvAC intra: 92.0% 95.0% 73.2% inter: 0.1% 1.4% 0.0%
    
    [libx264 @ 0x3950ce0] i16 v,h,dc,p:  1% 30%  4% 66%
    
    [libx264 @ 0x3950ce0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  6% 55% 16%  2%  4%  2%  8%  2%  6%
    
    [libx264 @ 0x3950ce0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 18% 13%  7%  9%  7% 12%  6% 11%
    
    [libx264 @ 0x3950ce0] i8c dc,h,v,p: 44% 35% 10% 11%
    
    [libx264 @ 0x3950ce0] Weighted P-Frames: Y:0.0% UV:0.0%
    
    [libx264 @ 0x3950ce0] ref P L0: 98.1%  0.2%  1.1%  0.5%
    
    [libx264 @ 0x3950ce0] ref B L0: 85.1% 13.2%  1.7%
    
    [libx264 @ 0x3950ce0] ref B L1: 93.6%  6.4%
    
    [libx264 @ 0x3950ce0] kb/s:174.10

  • ffmpeg : how to correctly program input framerate calculation, given desired video length duration and output framerate ?

    19 septembre 2015, par user89

    Let us say that I have n pictures named as imgXY.png (where XY represent the numbers 0 to n-1, properly padded with zeros).

    From these, I would like to create a video that is t seconds long, that has an (output) framerate R.

    I want to figure out what the input framerate should be, so I do the following calculation :

    • time spent per frame : t_per_frame = t/n

    • input framerate : 1/t_per_frame = n/t

    However, when I then try to create a movie using the following command :

    ffmpeg -framerate n/t -i img%02d.png -r 30 test_output.mp4

    I don’t get a movie that is t seconds long, and only two of the frames end up getting displayed. Why is this the case ?

    The following questions were unhelpful :

    How to successfully use ffmpeg to convert images into videos

    Turning images into videos with ffmpeg

    I think I am misunderstanding what is meant by input framerate, and what is meant by output framerate. Could you help clarify ? I am using a Python script to call ffmpeg, as documented here : http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/

    Here’s the output from the following manually executed command :

    ffmpeg -framerate 24/5 -i img%02d.png -c:v libx264 -r 30 -pix_fmt yuv420p test_output.mp4

    ffmpeg version N-75204-g314bc20 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 4.9.3 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
    
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
    
ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
    
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
    
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
    
ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
    
 --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
    
e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
    
ble-decklink --enable-opencl --enable-zlib
    
  libavutil      55.  2.100 / 55.  2.100
    
  libavcodec     57.  1.100 / 57.  1.100
    
  libavformat    57.  0.100 / 57.  0.100
    
  libavdevice    57.  0.100 / 57.  0.100
    
  libavfilter     6.  1.100 /  6.  1.100
    
  libswscale      4.  0.100 /  4.  0.100
    
  libswresample   2.  0.100 /  2.  0.100
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, image2, from 'img%02d.png':
    
  Duration: 00:00:00.42, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: png, rgb24(pc), 800x400, 4.80 tbr, 4.80 tbn, 4.80 tbc
    
File 'test_output.mp4' already exists. Overwrite ? [y/N] y
    
[libx264 @ 0000000004f16ba0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
    
AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0000000004f16ba0] profile High, level 3.0
    
[libx264 @ 0000000004f16ba0] 264 - core 148 r2597 e86f3a1 - H.264/MPEG-4 AVC cod
    
ec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 r
    
ef=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_pski
    
p=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 dec
    
imate=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=
    
25 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
    
Output #0, mp4, to 'test_output.mp4':
    
  Metadata:
    
    encoder         : Lavf57.0.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 800x40
    
0, q=-1--1, 30 fps, 15360 tbn, 30 tbc
    
    Metadata:
    
      encoder         : Lavc57.1.100 libx264
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
frame=   12 fps=0.0 q=-1.0 Lsize=       3kB time=00:00:00.33 bitrate=  62.2kbits
    
/s dup=10 drop=0
    
video:2kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ove
    
rhead: 60.557274%
    
[libx264 @ 0000000004f16ba0] frame I:1     Avg QP:10.12  size:   566
    
[libx264 @ 0000000004f16ba0] frame P:3     Avg QP:18.10  size:    62
    
[libx264 @ 0000000004f16ba0] frame B:8     Avg QP:13.75  size:    22
    
[libx264 @ 0000000004f16ba0] consecutive B-frames:  8.3%  0.0% 25.0% 66.7%
    
[libx264 @ 0000000004f16ba0] mb I  I16..4: 99.4%  0.0%  0.6%
    
[libx264 @ 0000000004f16ba0] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.0%  0.0
    
%  0.0%  0.0%  0.0%    skip:99.9%
    
[libx264 @ 0000000004f16ba0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.1%  0.0
    
%  0.0%  direct: 0.0%  skip:99.9%  L0:37.5% L1:62.5% BI: 0.0%
    
[libx264 @ 0000000004f16ba0] 8x8 transform intra:0.0% inter:0.0%
    
[libx264 @ 0000000004f16ba0] coded y,uvDC,uvAC intra: 0.6% 0.0% 0.0% inter: 0.0%
    
 0.0% 0.0%
    
[libx264 @ 0000000004f16ba0] i16 v,h,dc,p: 96%  0%  4%  0%
    
[libx264 @ 0000000004f16ba0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 18% 36%  2%  2%
    
 3%  3%  5%  1%
    
[libx264 @ 0000000004f16ba0] i8c dc,h,v,p: 100%  0%  0%  0%
    
[libx264 @ 0000000004f16ba0] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0000000004f16ba0] ref P L0: 50.0% 50.0%
    
[libx264 @ 0000000004f16ba0] kb/s:18.50

  • FFMpeg is dropping video track when clipping an mpg video

    16 juin 2017, par M. Grishaber

    I am extracting a clip from an mpg video using the following command.
    ffmpeg.exe -i 271b.mpg -ss 00:00:05.000 -t 00:00:03.200 -c copy out_271b.mpg

    I am using the copy parameter to avoid reencoding the clip.
    The resulting mpg file only has the audio track, no video.
    The following is the FFMpeg screen dump.

    C:\ffmpeg-20170615\bin>ffmpeg.exe -i 271b.mpg -ss 00:00:05.000 -t 00:00:03.200 -c copy out_271b.mpg
    
    ffmpeg version N-86482-gbc40674 Copyright (c) 2000-2017 the FFmpeg developers
    
      built with gcc 7.1.0 (GCC)
    
      configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    
      libavutil      55. 66.100 / 55. 66.100
    
      libavcodec     57. 99.100 / 57. 99.100
    
      libavformat    57. 73.100 / 57. 73.100
    
      libavdevice    57.  7.100 / 57.  7.100
    
      libavfilter     6. 92.100 /  6. 92.100
    
      libswscale      4.  7.101 /  4.  7.101
    
      libswresample   2.  8.100 /  2.  8.100
    
      libpostproc    54.  6.100 / 54.  6.100
    
    Input #0, mpeg, from '271b.mpg':
    
      Duration: 00:01:11.44, start: 0.460000, bitrate: 2154 kb/s
    
        Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, progressive), 640x480 [SAR 1:1 DAR 4:3], 2000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    
        Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, mono, s16p, 128 kb/s
    
    [mpeg @ 0000000000666aa0] VBV buffer size not set, using default size of 130KB
    
    If you want the mpeg file to be compliant to some specification
    
    Like DVD, VCD or others, make sure you set the correct buffer size
    
    Output #0, mpeg, to 'out_271b.mpg':
    
      Metadata:
    
        encoder         : Lavf57.73.100
    
        Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, bt470bg, progressive), 640x480 [SAR 1:1 DAR 4:3], q=2-31, 2000 kb/s, 25 fps, 25 tbr, 90k tbn, 25 tbc
    
        Stream #0:1: Audio: mp2, 44100 Hz, mono, s16p, 128 kb/s
    
    Stream mapping:
    
      Stream #0:0 -> #0:0 (copy)
    
      Stream #0:1 -> #0:1 (copy)
    
    Press [q] to stop, [?] for help
    
    frame=   74 fps=0.0 q=-1.0 Lsize=     786kB time=00:00:03.17 bitrate=2027.2kbits/s speed= 198x
    
    video:730kB audio:50kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.843343%

    Thanks

    Addition : I tried to open the generated clip file with ffplay and got the following results. Note that ffplay was able to open and play the original mpg file.

    ffplay.exe out_271b.mpg
    
ffplay version N-86482-gbc40674 Copyright (c) 2003-2017 the FFmpeg developers
    
  built with gcc 7.1.0 (GCC)
    
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    
  libavutil      55. 66.100 / 55. 66.100
    
  libavcodec     57. 99.100 / 57. 99.100
    
  libavformat    57. 73.100 / 57. 73.100
    
  libavdevice    57.  7.100 / 57.  7.100
    
  libavfilter     6. 92.100 /  6. 92.100
    
  libswscale      4.  7.101 /  4.  7.101
    
  libswresample   2.  8.100 /  2.  8.100
    
  libpostproc    54.  6.100 / 54.  6.100
    
[mpeg @ 00000000023cde80] probed stream 2 failedB sq=    0B f=0/0
    
[mpeg @ 00000000023cde80] start time for stream 0 is not set in estimate_timings_from_pts
    
[mpeg @ 00000000023cde80] Could not find codec parameters for stream 2 (Video: none, none): unknown codec
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Input #0, mpeg, from 'out_271bb.mpg':
    
  Duration: 00:00:03.22, start: 0.500000, bitrate: 2068 kb/s
    
    Stream #0:0[0x1bf]: Data: dvd_nav_packet  0KB sq=    0B f=0/0
    
    Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, mono, s16p, 128 kb/s
    
    Stream #0:2[0x1e0]: Video: none, none, 25 fps, 25 tbr, 90k tbn
    
SDL_OpenAudio (1 channels, 44100 Hz): DirectSoundCreate: No audio device found
    
No more combinations to try, audio open failed
    
No codec could be found with id 0
    
Failed to open file 'out_271b.mpg' or configure filtergraph

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