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• lavc/vaapi_encode : Change the slice/parameter buffers to dynamic alloc.

  24 août 2017, par Jun Zhao

  lavc/vaapi_encode : Change the slice/parameter buffers to dynamic alloc.
  Change the slice/parameter buffers to be allocated dynamically.
  Signed-off-by : Wang, Yi A <yi.a.wang@intel.com>
  
  Signed-off-by : Jun Zhao <jun.zhao@intel.com>
  
  Signed-off-by : Mark Thompson <sw@jkqxz.net>
  

  • [DH] libavcodec/vaapi_encode.c
  • [DH] libavcodec/vaapi_encode.h

• Converting 2-channel .mov file to .mp3 with ffmpeg

  29 mai 2019, par Josh Earl

  I use Skype Call Recorder to record Skype interviews. The app saves files in .mov format, with 2 audio channels.

  When I submit these files for transcription, they always come back with just one channel transcribed.

  I need to 1.) merge the tracks, and 2.) convert the .mov file to .mp3 format.

  Right now the command I’m working with is :

  ffmpeg -i input.mov -map 0:a output.mp3

  I get the following errors :

   Invalid audio stream. Exactly one MP3 audio stream is required.
  
   Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

  What am I missing ?

  Here’s the full console output, if it helps :

  ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
    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 'input.mov':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      creation_time   : 2019-05-18 15:00:59
  
    Duration: 00:11:41.82, start: 0.000000, bitrate: 120 kb/s
  
      Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 58 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-05-18 15:00:59
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 58 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-05-18 15:00:59
  
        handler_name    : Apple Alias Data Handler
  
  [mp3 @ 0x7fd8b1003c00] Invalid audio stream. Exactly one MP3 audio stream is required.
  
  Output #0, mp3, to 'output.mp3':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      encoder         : Lavf56.25.101
  
      Stream #0:0(eng): Audio: mp3 (libmp3lame), 44100 Hz, mono, fltp (default)
  
      Metadata:
  
        creation_time   : 2019-05-18 15:00:59
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Lavc56.26.100 libmp3lame
  
      Stream #0:1(eng): Audio: mp3 (libmp3lame), 44100 Hz, mono, fltp (default)
  
      Metadata:
  
        creation_time   : 2019-05-18 15:00:59
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Lavc56.26.100 libmp3lame
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (aac (native) -> mp3 (libmp3lame))
  
    Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

• ffmpeg stuck in generating thumbnail of video [closed]

  10 décembre 2019, par user6121419

  I’m trying to create a thumbnail of a .mov video with ffmpeg, but it gets stuck.
  I tried the same command on 2 different machines and with different types of arguments, but nothing changed the result. The video itself can be viewed without a problem, so it shouldn’t be corrupted.
  The video was taken on an iphone at 4k 60fps.

  What I’ve tried :

  ffmpeg -i IMG_1001.MOV -ss 00:00:02 -vframes 1 thumbnail.jpg

  It gets stuck at the third last line frame= 0 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=   0x and from then on, I stopped the process with ctrl+c

  Output :

  ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
 built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
 configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --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-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --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-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
 libavutil      55. 78.100 / 55. 78.100
 libavcodec     57.107.100 / 57.107.100
 libavformat    57. 83.100 / 57. 83.100
 libavdevice    57. 10.100 / 57. 10.100
 libavfilter     6.107.100 /  6.107.100
 libavresample   3.  7.  0 /  3.  7.  0
 libswscale      4.  8.100 /  4.  8.100
 libswresample   2.  9.100 /  2.  9.100
 libpostproc    54.  7.100 / 54.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'IMG_1001.MOV':
 Metadata:
   major_brand     : qt
   minor_version   : 0
   compatible_brands: qt
   creation_time   : 2019-11-xx
   com.apple.quicktime.make: Apple
   com.apple.quicktime.model: iPhone 8
   com.apple.quicktime.software: 13.2.2
   com.apple.quicktime.creationdate: 2019-11-xx
 Duration: 00:00:05.18, start: 0.000000, bitrate: 54961 kb/s
   Stream #0:0(und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 3840x2160, 54851 kb/s, 60 fps, 60 tbr, 600 tbn, 600 tbc (default)
   Metadata:
     creation_time   : 2019-11-xx
     handler_name    : Core Media Data Handler
     encoder         : HEVC
   Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 94 kb/s (default)
   Metadata:
     creation_time   : 2019-11-xx
     handler_name    : Core Media Data Handler
   Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
   Metadata:
     creation_time   : 2019-11-xx
     handler_name    : Core Media Data Handler
   Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
   Metadata:
     creation_time   : 2019-11-xx
     handler_name    : Core Media Data Handler
Stream mapping:
 Stream #0:0 -> #0:0 (hevc (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x55d83a288940] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to 'thumbnail.jpg':
 Metadata:
   major_brand     : qt
   minor_version   : 0
   compatible_brands: qt
   com.apple.quicktime.creationdate: 2019-11-xx
   com.apple.quicktime.make: Apple
   com.apple.quicktime.model: iPhone 8
   com.apple.quicktime.software: 13.2.2
   encoder         : Lavf57.83.100
   Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 3840x2160, q=2-31, 200 kb/s, 60 fps, 60 tbn, 60 tbc (default)
   Metadata:
     creation_time   : 2019-11-xx
     handler_name    : Core Media Data Handler
     encoder         : Lavc57.107.100 mjpeg
   Side data:
     cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame=    0 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=   0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)

  Any idea on what it could be ? Am I missing something or could it be that the encoding can’t be read properly by ffmpeg ? Besides that I haven’t found any alternative to generate thumbnails from videos on linux