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• Unable to playback .mp4 audio file in Firefox, works in Chrome

  22 octobre 2015, par SpartanVXL

  I have been trying to play a file through Firefox to see if it is compatible for a website and cannot figure out why it cannot play whereas it will play on Chrome okay. It simply shows a error box that the "video cannot be played because the file is corrupt". I’ve trawled through information on .mp4 files and Firefox’s supported codec types but have not found much aside from recent posts on how FF should be able to play this content in 2015. Here is a ffprobe of the file.

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'two.mp4':
Metadata:
   major_brand     : mp42
   minor_version   : 0
   compatible_brands: M4A mp42isom
   creation_time   : 2015-08-06 08:17:05
   encoder         : Nero AAC codec / 1.5.4.0
   Duration        : 00:03:28.77, start: 0.000000, bitrate: 131 kb/s
   Chapter #0:0    : start 0.027333, end 208.768000
   Metadata:
     title           :
   Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 96000 Hz, stereo, flt p, 128 kb/s (default)

  Any reason why this local file wouldn’t play through FF on Windows 41.0.2 ?

• ffmpeg creating mp4 vs mp4

  23 octobre 2015, par user1207446

  I have two mp4 files. One of them was given to me and plays well under mediawiki (using the MediawikiPlayer extension). The other I created from a WMV file and it does not play. When I look at the two files through the eyes of ffprobe, they appear to be very different. The working file returns this :

  Metadata:
  
    major_brand     : mp42
  
    minor_version   : 0
  
    compatible_brands: mp42isomavc1
  
    creation_time   : 2013-12-28 20:25:51
  
    encoder         : HandBrake 0.9.9 2013052900
  
  Duration: 00:00:17.05, start: 0.000000, bitrate: 957 kb/s
  
    Chapter #0:0: start -0.066733, end 17.017000
  
    Metadata:
  
      title           : Chapter 1
  
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 704x480 [SAR 10:11 DAR 4:3], 824 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 180k tbc (default)
  
    Metadata:
  
      creation_time   : 2013-12-28 20:25:51
  
      encoder         : JVT/AVC Coding
  
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
    Metadata:
  
      creation_time   : 2013-12-28 20:25:51
  
    Stream #0:2(und): Subtitle: mov_text (text / 0x74786574), 0 kb/s
  
    Metadata:
  
      creation_time   : 2013-12-28 20:25:51

  The non-working produces this :

  Metadata:
  
    major_brand     : isom
  
    minor_version   : 512
  
    compatible_brands: isomiso2mp41
  
    encoder         : Lavf55.0.100
  
  Duration: 00:05:25.79, start: 0.033333, bitrate: 1331 kb/s
  
    Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 704x528 [SAR 1:1 DAR 4:3], 1198 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
  
    Metadata:
  
      handler_name    : VideoHandler
  
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
    Metadata:
  
      handler_name    : SoundHandler

  What ffmpeg options do I need to supply to convert my wmv file to an mp4 file like the first of those listed here (the working one) ?

  Update : 2015-10-23, here is the full output from ffmpeg for the non-working file :

  E:\>ffmpeg -i non-working.mp4
  
  ffmpeg version N-71329-g235589e Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu
  
  ray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena
  
  ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
  
  ble-decklink --enable-zlib
  
    libavutil      54. 22.101 / 54. 22.101
  
    libavcodec     56. 34.100 / 56. 34.100
  
    libavformat    56. 30.100 / 56. 30.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 13.101 /  5. 13.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'non-working.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2mp41
  
      encoder         : Lavf55.0.100
  
    Duration: 00:10:12.94, start: 0.033333, bitrate: 1324 kb/s
  
      Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 704x528 [SAR 1:1 DAR 4:3], 1191 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  At least one output file must be specified

• Merging audio at specific time with ffmpeg

  19 octobre 2015, par Deepu

  I was trying to merge audio with ffmpeg with the following command but the audio is merging at starting point.

  ffmpeg -i output-1146.mp4 -i org-EOLWAudio.mp3 -filter_complex " [0:a]atrim=start=0,asetpts=PTS-STARTPTS[aud1]; [1:a]atrim=0:250,asetpts=PTS+100/TB[aud2]; [aud1][aud2]amix=inputs=2[aout]" -map 0:v -map "[aout]" -crf 24 -pix_fmt yuv420p -c:v libx264 -c:a aac -strict -2 -ac 2 output-1246.mp4

  With this command it is merging audio streams but not specified point of time.

  I want to merge audio of a mp3 file from 0 to 250 seconds audio to video
  Starting at 4th minute to 8.10 minute.

  Output :

  ffmpeg version 2.6.3 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration: --arch=x86_64 --optflags='-02 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --[aram=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-frei0r --enable-gnutls --enable-libass --enable-libcdio --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --enable-runtime-cpudetect
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output-1146.mp4':
  
  
  
  Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.25.101
  
    Duration: 00:15:03.80, start: 0.064000, bitrate: 212 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1366x768, 137 kb/s, 5 fps, 5 tbr, 10240 tbn, 10 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, stereo, fltp, 116 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Input #1, mp3, from 'org-EOLWAudio.mp3':
  
    Metadata:
  
      novideocodec    : 0
  
      server          : Red5
  
      creationdate    : Wed Sep 23 15:51:29 IST 2015
  
      canSeekToEnd    : true
  
      encoder         : Lavf56.25.101
  
    Duration: 00:14:00.74, start: 0.069063, bitrate: 48 kb/s
  
      Stream #1:0: Audio: mp3, 16000 Hz, stereo, s16p, 48 kb/s
  
  
  
  [libx264 @ 0x9d67440] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x9d67440] profile High, level 3.2
  
  [libx264 @ 0x9d67440] 264 - core 142 r2389 956c8d8 - 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=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=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=24.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00