Recherche avancée

Sur d’autres sites (7826)

• How to optimize ffmpeg command

  25 juin 2020, par Mikołaj Henklewski

  I have such command :

  


   ffmpeg -i /media/4f908e5e971140d09eb19590c3a571ab.mp4 
-loop 1 -i /assets/531d9a4daf6a4ee2ae0746d5b15498e0.png -t 2.0 
-filter_complex "[1:v]format=rgba,colorchannelmixer=aa=1.0[alpha];[alpha]scale=iw*2:ih*2[alpha_big];[alpha_big]rotate=0.0:c=none:ow=rotw(0.0):oh=roth(0.0)[alpha_big_rot];[alpha_big_rot]format=rgba,fade=t=out:d=1.0:alpha=true:st=0.54[alpha_big_rot_fade];
[alpha_big_rot_fade]scale=iw/4:ih/4[alpha_rot_fade];
[0:v][alpha_rot_fade] overlay=x=0.0:y=0.0:enable='between(t,0.0,1.54)'" -preset ultrafast -crf 0 /media/b47470cd610941949f6e01b06fe5b2e6.mp4


  


  here you have log for above command :

  


  ffmpeg version 3.2.14-1~deb9u1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --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-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --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-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 34.101 / 55. 34.101
  libavcodec     57. 64.101 / 57. 64.101
  libavformat    57. 56.101 / 57. 56.101
  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 '/media/4f908e5e971140d09eb19590c3a571ab.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.56.101
  Duration: 00:00:02.00, start: 0.000000, bitrate: 1495 kb/s
    Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv420p, 720x720 [SAR 1:1 DAR 1:1], 1491 kb/s, 23.98 fps, 23.98 tbr, 19184 tbn, 47.96 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Input #1, png_pipe, from '/assets/531d9a4daf6a4ee2ae0746d5b15498e0.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 1627x1440, 25 fps, 25 tbr, 25 tbn, 25 tbc
[libx264 @ 0x558c06195660] using SAR=1/1
[libx264 @ 0x558c06195660] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x558c06195660] profile High 4:4:4 Predictive, level 3.1, 4:2:0 8-bit
[libx264 @ 0x558c06195660] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=23 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=0
Output #0, mp4, to '/media/b47470cd610941949f6e01b06fe5b2e6.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.56.101
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 720x720 [SAR 1:1 DAR 1:1], q=-1--1, 23.98 fps, 19184 tbn, 23.98 tbc (default)
    Metadata:
      encoder         : Lavc57.64.101 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream mapping:
  Stream #0:0 (h264) -> overlay:main
  Stream #1:0 (png) -> format
  overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
frame=    8 fps=7.2 q=0.0 size=     274kB time=00:00:00.00 bitrate=43232461.5kbits/s speed=4.66e-05x Past duration 0.998741 too large   5605kB time=00:00:01.66 bitrate=27523.4kbits/s speed=0.265x
frame=   48 fps=7.5 q=-1.0 Lsize=    5606kB time=00:00:01.96 bitrate=23428.8kbits/s speed=0.306x
video:5605kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.018714%
[libx264 @ 0x558c06195660] frame I:1     Avg QP: 0.00  size:280440
[libx264 @ 0x558c06195660] frame P:47    Avg QP: 0.00  size:116129
[libx264 @ 0x558c06195660] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x558c06195660] mb P  I16..4: 11.9%  0.0%  0.0%  P16..4: 38.6%  0.0%  0.0%  0.0%  0.0%    skip:49.5%
[libx264 @ 0x558c06195660] coded y,uvDC,uvAC intra: 100.0% 95.9% 95.9% inter: 42.8% 26.3% 26.2%
[libx264 @ 0x558c06195660] i16 v,h,dc,p:  4% 96%  0%  0%
[libx264 @ 0x558c06195660] i8c dc,h,v,p:  5% 85% 11%  0%
[libx264 @ 0x558c06195660] kb/s:22934.92


  


  Is there any way to execute it faster ? Or maybe I have to use gpu to proceed it faster ? Any ideas ? I execute it very often and any shortening time would be great.

  


  I read about hardware acceleration, but I am not sure if it will help. It is possible also to upgrade version of ffpmeg, but will it help ?

  


• Video Created By FFMPEG is Blank [on hold]

  11 octobre 2015, par Larry Holze

  New to FFMPEG and trying to use it very simplistically. I have a sequence of images that I want to make into a video. Using this command :

  ffmpeg -framerate 30 -i "fr_%05d.jpg" out.mp4

  Creates the out.mp4 file OK, but when I play it back it is just blank.
  Pictures in the .jpg sequence are definitely not blank.

  Am I missing some option(s) ?

  Command window output :

  ffmpeg version N-74700-g628a73f 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-zlib
  
  
  
    libavutil      54. 31.100 / 54. 31.100
  
  
  
    libavcodec     56. 59.100 / 56. 59.100
  
  
  
    libavformat    56. 40.101 / 56. 40.101
  
  
  
    libavdevice    56.  4.100 / 56.  4.100
  
  
  
    libavfilter     5. 39.100 /  5. 39.100
  
  
  
    libswscale      3.  1.101 /  3.  1.101
  
  
  
    libswresample   1.  2.101 /  1.  2.101
  
  
  
    libpostproc    53.  3.100 / 53.  3.100
  
  
  
  Input #0, image2, from 'fr_%05d.jpg':
  
  
  
    Duration: 00:00:30.03, start: 0.000000, bitrate: N/A
  
  
  
      Stream #0:0: Video: mjpeg, gray(bt470bg/unknown/unknown), 300x200 [SAR 90:90
  
  
  
   DAR 3:2], 30 fps, 30 tbr, 30 tbn, 30 tbc
  
  
  
  [swscaler @ 0000000002f88c60] deprecated pixel format used, make sure you did se
  
  
  
  t range correctly
  
  
  
  No pixel format specified, yuvj444p for H.264 encoding chosen.
  
  
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  
  
  [libx264 @ 000000000589b0c0] using SAR=1/1
  
  
  
  [libx264 @ 000000000589b0c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  
  
  AVX
  
  
  
  [libx264 @ 000000000589b0c0] profile High 4:4:4 Predictive, level 1.3, 4:4:4 8-b
  
  
  
  it
  
  
  
  [libx264 @ 000000000589b0c0] 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=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decim
  
  
  
  ate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_a
  
  
  
  dapt=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 'out.mp4':
  
  
  
    Metadata:
  
  
  
      encoder         : Lavf56.40.101
  
  
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj444p(pc), 3
  
  
  
  00x200 [SAR 1:1 DAR 3:2], q=-1--1, 30 fps, 15360 tbn, 30 tbc
  
  
  
      Metadata:
  
  
  
        encoder         : Lavc56.59.100 libx264
  
  
  
  Stream mapping:
  
  
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  
  
  Press [q] to stop, [?] for help
  
  
  
  Input stream #0:0 frame changed from size:300x200 fmt:gray to size:300x200 fmt:y
  
  
  
  uvj444p
  
  
  
  Input stream #0:0 frame changed from size:300x200 fmt:yuvj444p to size:300x200 f
  
  
  
  mt:gray
  
  
  
  [swscaler @ 00000000095b75c0] deprecated pixel format used, make sure you did se
  
  
  
  t range correctly
  
  
  
  Input stream #0:0 frame changed from size:300x200 fmt:gray to size:300x200 fmt:y
  
  
  
  uvj444p
  
  
  
  Input stream #0:0 frame changed from size:300x200 fmt:yuvj444p to size:300x200 f
  
  
  
  mt:gray
  
  
  
  [swscaler @ 00000000095b75c0] deprecated pixel format used, make sure you did se
  
  
  
  t range correctly
  
  
  
  Input stream #0:0 frame changed from size:300x200 fmt:gray to size:300x200 fmt:y
  
  
  
  uvj444p
  
  
  
  frame=  244 fps=0.0 q=29.0 size=      15kB time=00:00:06.40 bitrate=  19.6kbits/
  
  
  
  Input stream #0:0 frame changed from size:300x200 fmt:yuvj444p to size:300x200 f
  
  
  
  mt:gray
  
  
  
  [swscaler @ 00000000095b75c0] deprecated pixel format used, make sure you did se
  
  
  
  t range correctly
  
  
  
  Input stream #0:0 frame changed from size:300x200 fmt:gray to size:300x200 fmt:y
  
  
  
  uvj444p
  
  
  
  frame=  325 fps=316 q=29.0 size=      23kB time=00:00:09.10 bitrate=  20.4kbits/
  
  
  
  frame=  382 fps=247 q=29.0 size=      34kB time=00:00:11.00 bitrate=  25.1kbits/
  
  
  
  frame=  417 fps=203 q=29.0 size=      36kB time=00:00:12.16 bitrate=  24.5kbits/
  
  
  
  frame=  482 fps=187 q=29.0 size=      38kB time=00:00:14.33 bitrate=  21.7kbits/
  
  
  
  frame=  541 fps=175 q=29.0 size=      39kB time=00:00:16.30 bitrate=  19.8kbits/
  
  
  
  frame=  611 fps=170 q=29.0 size=      41kB time=00:00:18.63 bitrate=  18.1kbits/
  
  
  
  frame=  881 fps=214 q=29.0 size=      54kB time=00:00:27.63 bitrate=  15.9kbits/
  
  
  
  frame=  901 fps=214 q=-1.0 Lsize=      66kB time=00:00:29.96 bitrate=  18.1kbits
  
  
  
  /s
  
  
  
  video:55kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ov
  
  
  
  erhead: 20.648893%
  
  
  
  [libx264 @ 000000000589b0c0] frame I:8     Avg QP:18.01  size:  2331
  
  
  
  [libx264 @ 000000000589b0c0] frame P:239   Avg QP:22.95  size:    91
  
  
  
  [libx264 @ 000000000589b0c0] frame B:654   Avg QP:33.33  size:    23
  
  
  
  [libx264 @ 000000000589b0c0] consecutive B-frames:  2.9%  0.7%  1.0% 95.4%
  
  
  
  [libx264 @ 000000000589b0c0] mb I  I16..4: 36.6% 53.8%  9.6%
  
  
  
  [libx264 @ 000000000589b0c0] mb P  I16..4:  0.1%  0.4%  0.2%  P16..4:  0.6%  0.0
  
  
  
  %  0.0%  0.0%  0.0%    skip:98.6%
  
  
  
  [libx264 @ 000000000589b0c0] mb B  I16..4:  0.0%  0.9%  0.0%  B16..8:  1.7%  0.0
  
  
  
  %  0.0%  direct: 0.0%  skip:97.4%  L0:55.9% L1:44.1% BI: 0.0%
  
  
  
  [libx264 @ 000000000589b0c0] 8x8 transform intra:70.8% inter:12.0%
  
  
  
  [libx264 @ 000000000589b0c0] coded y,u,v intra: 5.9% 4.9% 5.0% inter: 0.0% 0.0%
  
  
  
  0.0%
  
  
  
  [libx264 @ 000000000589b0c0] i16 v,h,dc,p: 54% 46%  0%  0%
  
  
  
  [libx264 @ 000000000589b0c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13%  5% 83%  0%  0%
  
  
  
   0%  0%  0%  0%
  
  
  
  [libx264 @ 000000000589b0c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 47% 15% 10%  4%  6%
  
  
  
   5%  4%  4%  4%
  
  
  
  [libx264 @ 000000000589b0c0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  
  
  [libx264 @ 000000000589b0c0] ref P L0: 47.6%  2.6% 44.9%  5.0%
  
  
  
  [libx264 @ 000000000589b0c0] ref B L0: 55.9% 40.1%  4.0%
  
  
  
  [libx264 @ 000000000589b0c0] ref B L1: 93.3%  6.7%
  
  
  
  [libx264 @ 

• 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