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  • FFMPEG "buffer queue overflow, dropping" with trim and atrim filters

    11 décembre 2016, par Prasanna Mahendiran

    In FFMPEG I am actually trimming and concating a 24 FPS video. When I apply a complex filter

    ffmpeg -i sample.mp4 -filter_complex \
    
  "[0:v]setpts = PTS-STARTPTS[bv];
    
  [bv]split=6[v0][v1][v2][v3][v4][v5];
    
  [v0]trim=start_frame=1:end_frame=142,loop=1:1:1,setpts=N/FRAME_RATE/TB[0v];
    
  [v1]trim=start_frame=846:end_frame=878,loop=1:1:1,setpts=N/FRAME_RATE/TB[1v];
    
  [v2]trim=start_frame=57:end_frame=114,loop=1:1:1,setpts=N/FRAME_RATE/TB[2v];
    
  [v3]trim=start_frame=865:end_frame=885,loop=1:1:1,setpts=N/FRAME_RATE/TB[3v];
    
  [v4]trim=start_frame=70:end_frame=155,loop=1:1:1,setpts=N/FRAME_RATE/TB[4v];
    
  [v5]trim=start_frame=155:end_frame=909,loop=1:1:1,setpts=N/FRAME_RATE/TB[5v];
    
  [0:a]asplit=6[a0][a1][a2][a3][a4][a5];
    
  [a0]atrim=0.041666666666666664:5.917,asetpts=N/SR/TB[0a];
    
  [a1]atrim=35.256:36.603,asetpts=N/SR/TB[1a];
    
  [a2]atrim=2.379:4.767,asetpts=N/SR/TB[2a];
    
  [a3]atrim=36.024:36.859,asetpts=N/SR/TB[3a];
    
  [a4]atrim=2.93:6.438172,asetpts=N/SR/TB[4a];
    
  [a5]atrim=6.438172:37.895,asetpts=N/SR/TB[5a];
    
  [0v][0a][1v][1a][2v][2a][3v][3a][4v][4a][5v][5a]concat=n=6:v=1:a=1[vv][aa]"\
    
  -map "[vv]" -map "[aa]" output.mp4

    I am getting "buffer queue overflow, dropping" error. The resultant video and audio is still and not working properly.

    ffmpeg version 3.2-1~16.04.york1 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 5.4.1 (Ubuntu 5.4.1-3ubuntu1~ubuntu16.04.1york0) 20161019
    
  configuration: --prefix=/usr --extra-version='1~16.04.york1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-libtesseract --disable-stripping --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-libschroedinger --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-libxvid --enable-libzmq --enable-libzvbi --enable-opengl --enable-sdl2 --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-openal --enable-frei0r --enable-libopencv --enable-libx264 --enable-chromaprint --enable-shared
    
  libavutil      55. 34.100 / 55. 34.100
    
  libavcodec     57. 64.100 / 57. 64.100
    
  libavformat    57. 56.100 / 57. 56.100
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    track           : 0
    
    artist          : 
    
    album           : 
    
    date            : 0
    
    genre           : 
    
    lyrics          : 
    
    title           : 
    
    encoder         : Lavf56.36.100
    
  Duration: 00:00:37.90, start: 0.000000, bitrate: 951 kb/s
    
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 820 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 126 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
File 'output.mp4' already exists. Overwrite ? [y/N] y
    
[libx264 @ 0x55650097a540] using SAR=1/1
    
[libx264 @ 0x55650097a540] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x55650097a540] profile High, level 3.0
    
[libx264 @ 0x55650097a540] 264 - core 148 r2643 5c65704 - 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=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
    
Output #0, mp4, to 'output.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    track           : 0
    
    artist          : 
    
    album           : 
    
    date            : 0
    
    genre           : 
    
    lyrics          : 
    
    title           : 
    
    encoder         : Lavf57.56.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 24 fps, 12288 tbn, 24 tbc (default)
    
    Metadata:
    
      encoder         : Lavc57.64.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc57.64.100 aac
    
Stream mapping:
    
  Stream #0:0 (h264) -> setpts
    
  Stream #0:1 (aac) -> asplit
    
  concat:out:v0 -> Stream #0:0 (libx264)
    
  concat:out:a0 -> Stream #0:1 (aac)
    
Press [q] to stop, [?] for help
    
[Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 471.5kbits/s speed=4.94x    
    
    Last message repeated 201 times
    
[Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 522.9kbits/s speed=3.89x    
    
    Last message repeated 1266 times
    
[Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 557.0kbits/s speed=3.28x    
    
    Last message repeated 48 times
    
[output stream 0:1 @ 0x556500947e20] 100 buffers queued in output stream 0:1, something may be wrong.
    
[Parsed_concat_33 @ 0x55650097b420] Buffer queue overflow, dropping. 718.6kbits/s speed=3.46x    
    
    Last message repeated 19 times
    
[output stream 0:0 @ 0x5565009785c0] 100 buffers queued in output stream 0:0, something may be wrong.
    
frame= 1091 fps=117 q=-1.0 Lsize=    2795kB time=00:00:45.51 bitrate= 503.1kbits/s dup=475 drop=0 speed=4.88x    
    
video:2455kB audio:316kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.861779%
    
[libx264 @ 0x55650097a540] frame I:8     Avg QP:19.26  size: 24207
    
[libx264 @ 0x55650097a540] frame P:409   Avg QP:21.33  size:  4108
    
[libx264 @ 0x55650097a540] frame B:674   Avg QP:27.46  size:   949
    
[libx264 @ 0x55650097a540] consecutive B-frames: 10.3% 13.9% 24.5% 51.3%
    
[libx264 @ 0x55650097a540] mb I  I16..4:  9.9% 57.0% 33.1%
    
[libx264 @ 0x55650097a540] mb P  I16..4:  3.6%  7.6%  2.9%  P16..4: 33.0% 10.6%  3.0%  0.0%  0.0%    skip:39.2%
    
[libx264 @ 0x55650097a540] mb B  I16..4:  0.4%  0.8%  0.4%  B16..8: 24.5%  2.6%  0.2%  direct: 0.5%  skip:70.5%  L0:55.5% L1:41.8% BI: 2.7%
    
[libx264 @ 0x55650097a540] 8x8 transform intra:53.8% inter:66.7%
    
[libx264 @ 0x55650097a540] coded y,uvDC,uvAC intra: 44.6% 50.0% 14.8% inter: 6.2% 7.7% 0.2%
    
[libx264 @ 0x55650097a540] i16 v,h,dc,p: 22% 28% 17% 33%
    
[libx264 @ 0x55650097a540] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 23% 28%  3%  4%  3% 11%  3%  5%
    
[libx264 @ 0x55650097a540] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 26% 16%  2%  5%  3% 16%  3%  3%
    
[libx264 @ 0x55650097a540] i8c dc,h,v,p: 60% 22% 13%  6%
    
[libx264 @ 0x55650097a540] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x55650097a540] ref P L0: 72.6%  8.4% 15.1%  3.9%
    
[libx264 @ 0x55650097a540] ref B L0: 88.5% 10.7%  0.8%
    
[libx264 @ 0x55650097a540] ref B L1: 93.3%  6.7%
    
[libx264 @ 0x55650097a540] kb/s:442.30
    
[aac @ 0x556500979280] Qavg: 3215.870

    I tried with other stackoverflow questions but none of them worked. Also I think it is partially because the trim timings are mixed. That is start time can be anywhere between 0-end. When I make it strictly increasing it is working fine.

  • ffmpeg : Combine/merge multiple mp4 videos - not working

    9 juin 2016, par dtbaker

    Here is the command I am using to combine multiple videos :

    ffmpeg -i 75_540_38HQ2.mp4 -i 76_70_20.mp4 -i 76_173_80.mp4 -i 81_186_35.mp4 -vcodec copy -acodec copy Mux1.mp4

    The resulting Mux1.mp4 does not contain all videos. Only the first video (75_540_38HQ2.mp4). The file size of the source and resulting video is below (as you can see, resulting video is slightly larger than first vid) :

    $ ls -lh

    - rw-r—r— 1 dbaker dbaker  42M 2011-03-24 11:59 75_540_38HQ2.mp4

    - rw-r—r— 1 dbaker dbaker 236M 2011-03-24 12:09 76_173_80.mp4

    - rw-r—r— 1 dbaker dbaker  26M 2011-03-24 12:05 76_70_20.mp4

    - rw-r—r— 1 dbaker dbaker  54M 2011-03-24 12:15 81_186_35.mp4

    - rw-r—r— 1 dbaker dbaker  44M 2011-03-24 14:48 Mux1.mp4

    Here is the output of the ffmpeg command. To me it looks ok, showing the multiple source inputs and the single output.

    FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
  built on Mar 21 2011 18:05:32 with gcc 4.4.5
  configuration : —enable-gpl —enable-version3 —enable-nonfree —enable-postproc —enable-libfaac —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libtheora —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libxvid —enable-x11grab
  libavutil     50.36. 0 / 50.36. 0
  libavcore      0.16. 1 /  0.16. 1
  libavcodec    52.108. 0 / 52.108. 0
  libavformat   52.93. 0 / 52.93. 0
  libavdevice   52. 2. 3 / 52. 2. 3
  libavfilter    1.74. 0 /  1.74. 0
  libswscale     0.12. 0 /  0.12. 0
  libpostproc   51. 2. 0 / 51. 2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’75_540_38HQ2.mp4’ :
  Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    creation_time : 1970-01-01 00:00:00
    encoder : Lavf52.93.0
  Duration : 00:00:29.99, start : 0.000000, bitrate : 11517 kb/s
    Stream #0.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 11575 kb/s, 29.94 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    Metadata :
      creation_time : 1970-01-01 00:00:00
    Stream #0.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 127 kb/s
    Metadata :
      creation_time : 1970-01-01 00:00:00
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from ’76_70_20.mp4’ :
  Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    creation_time : 1970-01-01 00:00:00
    encoder : Lavf52.93.0
  Duration : 00:00:19.98, start : 0.000000, bitrate : 10901 kb/s
    Stream #1.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 10804 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    Metadata :
      creation_time : 1970-01-01 00:00:00
    Stream #1.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
    Metadata :
      creation_time : 1970-01-01 00:00:00
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from ’76_173_80.mp4’ :
  Metadata :
    major_brand : isom
    minor_version : 512
    compatible_brands : isomiso2avc1mp41
    creation_time : 1970-01-01 00:00:00
    encoder : Lavf52.93.0
  Duration : 00:03:09.99, start : 0.000000, bitrate : 10393 kb/s
    Stream #2.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 10321 kb/s, 29.96 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    Metadata :
      creation_time : 1970-01-01 00:00:00
    Stream #2.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
    Metadata :
      creation_time : 1970-01-01 00:00:00

    Seems stream 0 codec frame rate differs from container frame rate : 119.88 (120000/1001) -> 30000.00 (30000/1)
    
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from ’81_186_35.mp4’ :
    
  Metadata :
    
    major_brand : isom
    
    minor_version : 512
    
    compatible_brands : isomiso2avc1mp41
    
    creation_time : 1970-01-01 00:00:00
    
    encoder : Lavf52.93.0
    
  Duration : 00:00:35.00, start : 0.000000, bitrate : 12700 kb/s
    
    Stream #3.0(eng) : Video : h264, yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 12620 kb/s, 59.91 fps, 30k tbr, 60k tbn, 119.88 tbc
    
    Metadata :
    
      creation_time : 1970-01-01 00:00:00
    
    Stream #3.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
    
    Metadata :
    
      creation_time : 1970-01-01 00:00:00
    
Output #0, mp4, to ’Mux1.mp4’ :
    
  Metadata :
    
    major_brand : isom
    
    minor_version : 512
    
    compatible_brands : isomiso2avc1mp41
    
    creation_time : 1970-01-01 00:00:00
    
    encoder : Lavf52.93.0
    
    Stream #0.0(eng) : Video : libx264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], q=2-31, 11575 kb/s, 30k tbn, 29.97 tbc
    
    Metadata :
    
      creation_time : 1970-01-01 00:00:00
    
    Stream #0.1(eng) : Audio : libfaac, 48000 Hz, stereo, 128 kb/s
    
    Metadata :
    
      creation_time : 1970-01-01 00:00:00
    
Stream mapping :
    
  Stream #0.0 -> #0.0
    
  Stream #2.1 -> #0.1
    
Press [q] to stop encoding
    
frame=  883 fps=632 q=-1.0 Lsize=   44730kB time=29.40 bitrate=12465.1kbits/s    
    
video:41678kB audio:2969kB global headers:0kB muxing overhead 0.184548%

    Am I doing something blindingly stupid here ?

    The source videos came from a video camera, and are small snippets taken with ffmpeg -i bigfile.mp4 -ss 20 -t 10 -vcodec copy etc..

    Thanks heaps !!
    Dave

    Edit : couldn’t solve it so I just use avidemux GUI tool. It seemed to append the MP4’s just fine.

    Must be a problem with MP4’s or just the ones that come off a gopro camera.

  • Problems with FFMPEG concat and/or MP4BOX

    11 novembre 2016, par user3730954

    I’ve been searching for a reliable way to concat a large (>30) number of mp4 files.

    My methods so far have been trying the MP4BOX concat CLI, and FFMPEG’s concat filter (such as ffmpeg -auto_convert 1 -y -f concat -i files.txt -c copy out.mp4).

    Both tools produce the same problem : joining 2 or 3 files seems to work great, but any greater number produces a corrupted mp4 file (such as https://drive.google.com/file/d/0B_mWxBuwYcSgQjQtUnpQeUxVTm8/view). I can create a workaround where I join only 2 videos at a time, until all videos have been joined, but this does not work for an odd number of joins (i.e. 13).

    Why do these methods work on some files, but not others ?

    FFPROBE produces errors as you would expect on these corrupted files :

    error while decoding MB x y, bytestream z
    
Reference 2 >= 2
    
top block unavailable for requested intra mode

    example FFMPEG output :

    ffmpeg version N-80901-gfebc862 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
    
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --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-libfreetype --enable-gnutls --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-libvidstab
    
  libavutil      55. 28.100 / 55. 28.100
    
  libavcodec     57. 48.101 / 57. 48.101
    
  libavformat    57. 41.100 / 57. 41.100
    
  libavdevice    57.  0.102 / 57.  0.102
    
  libavfilter     6. 47.100 /  6. 47.100
    
  libavresample   3.  0.  0 /  3.  0.  0
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  1.100 /  2.  1.100
    
  libpostproc    54.  0.100 / 54.  0.100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x36b3a80] Auto-inserting h264_mp4toannexb bitstream filter
    
Input #0, concat, from 'twitter-files.txt':
    
  Duration: N/A, start: 0.000000, bitrate: 415 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 284 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 130 kb/s
    
    Metadata:
    
      handler_name    : SoundHandler
    
[mp4 @ 0x36b7dc0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    
    Last message repeated 1 times
    
Output #0, mp4, to 'twitter-tmp.mp4':
    
  Metadata:
    
    encoder         : Lavf57.41.100
    
    Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720, q=2-31, 284 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, 130 kb/s
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3733160] Auto-inserting h264_mp4toannexb bitstream filter
    
    Last message repeated 1 times
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3733140] Auto-inserting h264_mp4toannexb bitstream filter
    
[mp4 @ 0x36b7dc0] Packet with invalid duration -512 in stream 1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3733140] Auto-inserting h264_mp4toannexb bitstream filter
    
    Last message repeated 2 times
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x36ba960] Auto-inserting h264_mp4toannexb bitstream filter
    
[mp4 @ 0x36b7dc0] Packet with invalid duration -512 in stream 1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x36ba960] Auto-inserting h264_mp4toannexb bitstream filter
    
    Last message repeated 4 times
    
[mp4 @ 0x36b7dc0] Non-monotonous DTS in output stream 0:0; previous: 306957, current: 306445; changing to 306958. This may result in incorrect timestamps in the output file.
    
[mp4 @ 0x36b7dc0] Non-monotonous DTS in output stream 0:0; previous: 306958, current: 306957; changing to 306959. This may result in incorrect timestamps in the output file.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x36ba960] Auto-inserting h264_mp4toannexb bitstream filter
    
    Last message repeated 1 times
    
frame=  750 fps=0.0 q=-1.0 Lsize=    1088kB time=00:00:30.04 bitrate= 296.6kbits/s speed= 366x

    OSX output :

    ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with Apple LLVM version 7.3.0 (clang-703.0.31)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.0 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --enable-libvorbis --enable-libvpx --enable-vda
    
  libavutil      55. 17.103 / 55. 17.103
    
  libavcodec     57. 24.102 / 57. 24.102
    
  libavformat    57. 25.100 / 57. 25.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 31.100 /  6. 31.100
    
  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
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c49808c00] Auto-inserting h264_mp4toannexb bitstream filter
    
Input #0, concat, from 'twitter-files.txt':
    
  Duration: N/A, start: 0.000000, bitrate: 415 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 284 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 130 kb/s
    
    Metadata:
    
      handler_name    : SoundHandler
    
Output #0, mp4, to 'tmp-twitter.mp4':
    
  Metadata:
    
    encoder         : Lavf57.25.100
    
    Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720, q=2-31, 284 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, 130 kb/s
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c4a005400] Auto-inserting h264_mp4toannexb bitstream filter
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c4a800000] Auto-inserting h264_mp4toannexb bitstream filter
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c49800000] Auto-inserting h264_mp4toannexb bitstream filter
    
[mp4 @ 0x7f9c4a000c00] Packet with invalid duration -512 in stream 1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c49800000] Auto-inserting h264_mp4toannexb bitstream filter
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c4a800000] Auto-inserting h264_mp4toannexb bitstream filter
    
    Last message repeated 1 times
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c49800000] Auto-inserting h264_mp4toannexb bitstream filter
    
[mp4 @ 0x7f9c4a000c00] Packet with invalid duration -512 in stream 1
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c49800000] Auto-inserting h264_mp4toannexb bitstream filter
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c4a800000] Auto-inserting h264_mp4toannexb bitstream filter
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c4a005400] Auto-inserting h264_mp4toannexb bitstream filter
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c4a800e00] Auto-inserting h264_mp4toannexb bitstream filter
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c49800000] Auto-inserting h264_mp4toannexb bitstream filter
    
[mp4 @ 0x7f9c4a000c00] Non-monotonous DTS in output stream 0:0; previous: 306957, current: 306445; changing to 306958. This may result in incorrect timestamps in the output file.
    
[mp4 @ 0x7f9c4a000c00] Non-monotonous DTS in output stream 0:0; previous: 306958, current: 306957; changing to 306959. This may result in incorrect timestamps in the output file.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c49800000] Auto-inserting h264_mp4toannexb bitstream filter
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9c49010e00] Auto-inserting h264_mp4toannexb bitstream filter
    
frame=  750 fps=0.0 q=-1.0 Lsize=    1146kB time=00:00:30.04 bitrate= 312.4kbits/s speed= 192x  

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