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• ffmpeg mp4 upload to Twitter - Unsupported Error

  13 juin 2016, par Noitidart

  I have created a screencast, it was saved as webm. Using ffmpeg I converted it to a mp4 :

  That kind of file isn’t supported yet. Try uploading a gif, video, or picture instead.

  ffmpeg -f input.webm -pix_fmt yuv420p -strict -2 output.mp4

  I use yuv420p as that is what this topic says for twitter - https://twittercommunity.com/t/unable-to-upload-video-to-twitter/61721/3

  However when I open a new tab, go to twitter, click the photo icon, clicking upload instantly gives me error "That kind of file isn’t supported yet. Try uploading a gif, video, or picture instead.". It cant check the pix format that fast. Anyonek now what can be going on here ?

  Here is ffmpeg console output :

  ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jun  9 2014 20:01:41 with emcc (Emscripten GCC-like replacement) 1.12.0 (commit 6960d2296299e96d43e694806f5d35799ef8d39c)
  
    configuration: --cc=emcc --prefix=/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist --enable-cross-compile --target-os=none --arch=x86_32 --cpu=generic --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-doc --disable-devices --disable-pthreads --disable-w32threads --disable-network --disable-hwaccels --disable-parsers --disable-bsfs --disable-debug --disable-protocols --disable-indevs --disable-outdevs --enable-protocol=file
  
    libavutil      52. 66.100 / 52. 66.100
  
    libavcodec     55. 52.102 / 55. 52.102
  
    libavformat    55. 33.100 / 55. 33.100
  
    libavdevice    55. 10.100 / 55. 10.100
  
    libavfilter     4.  2.100 /  4.  2.100
  
    libswscale      2.  5.102 /  2.  5.102
  
    libswresample   0. 18.100 /  0. 18.100
  
  [vp8 @ 0xdde410] Warning: not compiled with thread support, using thread emulation
  
  Input #0, matroska,webm, from 'input.webm':
  
    Metadata:
  
      encoder         : QTmuxingAppLibWebM-0.0.1
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0(eng): Video: vp8, yuv420p, 1920x1200, SAR 1:1 DAR 8:5, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
  
  Incompatible pixel format 'yuv420p' for codec 'gif', auto-selecting format 'pal8'
  
  [swscaler @ 0xdd7f40] No accelerated colorspace conversion found from yuv420p to bgr8.
  
  [gif @ 0xde5290] Warning: not compiled with thread support, using thread emulation
  
  [vp8 @ 0xdde410] Warning: not compiled with thread support, using thread emulation
  
  Output #0, gif, to 'output/output.gif':
  
    Metadata:
  
      encoder         : Lavf55.33.100
  
      Stream #0:0(eng): Video: gif, pal8, 1920x1200 [SAR 1:1 DAR 8:5], q=2-31, 200 kb/s, 100 tbn, 30 tbc (default)
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (vp8 -> gif)
  
  Press [q] to stop, [?] for help
  
  frame=    1 fps=0.0 q=0.0 size=       0kB time=00:00:00.03 bitrate=   8.5kbits/s    
  
  frame=    6 fps=0.0 q=0.0 size=     640kB time=00:00:00.33 bitrate=15877.0kbits/s    
  
  frame=   12 fps= 11 q=0.0 size=    1452kB time=00:00:00.63 bitrate=18878.9kbits/s    
  
  frame=   17 fps= 10 q=0.0 size=    2080kB time=00:00:00.91 bitrate=18723.7kbits/s    
  
  frame=   22 fps=9.6 q=0.0 size=    2698kB time=00:00:01.16 bitrate=19052.0kbits/s    
  
  frame=   27 fps=9.7 q=0.0 size=    3294kB time=00:00:01.43 bitrate=18869.4kbits/s    
  
  frame=   33 fps=9.6 q=0.0 size=    4001kB time=00:00:01.76 bitrate=18622.0kbits/s    
  
  frame=   38 fps=9.5 q=0.0 size=    4567kB time=00:00:02.04 bitrate=18339.7kbits/s    
  
  frame=   44 fps=9.5 q=0.0 size=    5236kB time=00:00:02.37 bitrate=18097.4kbits/s    
  
  frame=   50 fps=9.7 q=0.0 size=    5902kB time=00:00:02.71 bitrate=17839.9kbits/s    
  
  frame=   55 fps=9.6 q=0.0 size=    6457kB time=00:00:02.96 bitrate=17868.9kbits/s    
  
  frame=   55 fps=9.6 q=0.0 Lsize=    6567kB time=00:00:02.96 bitrate=18175.9kbits/s    
  
  video:6623kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead -0.834044%

  Here is a screenshot :

  

• Révision 23073 : Encore une amélioration dans la gestion des caches compressés. Dans le cas des ca...

  27 juin 2016, par esj@rezo.net

  Pour s’assurer que le 2e fichier est bien postérieur au 1er (cas du squelette d’origine modifié ultérieurement et inroduit dans le cache par une autre session) on utilise filemtime comme le faisait le code de r15851 à l’origine (r15852 ne précise pas pourquoi une autre méthode, incompatible avec la stratégie d’aujourd’hui, serait meilleure).

• Compiling FFmpeg 3.1.1 for x86 using Android NDK

  7 juillet 2016, par user3032481

  The newest version of FFmpeg is 3.1.1. After version 3.1, I can’t compile FFmpeg for x86.(But 3.0.2 or earlier versions can be compiled.)

  The terminal shows ld: error: libavutil/../compat/strtod.o: incompatible target.

  My OS is Xubuntu 14.04 x86 and x86_64.(I have tried both of them.)

  My NDK version is r10e(x86) and r12b(x86_64).

  When I compile FFmpeg 3.0.2, it has no error.

  This is my configure :

  ./configure \
  
  --prefix="${PREFIX}" \
  
  --enable-shared \
  
  --disable-static \
  
  --disable-doc \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-ffserver \
  
  --cross-prefix="${PREFIX}/bin/i686-linux-android-" \
  
  --target-os=linux \
  
  --arch=x86 \
  
  --enable-cross-compile \
  
  --sysroot="${PREFIX}/sysroot" \
  
  --extra-cflags="" \
  
  --extra-ldflags="" \
  
  --extra-libs="" \
  
  --disable-debug

  ${PREFIX} is a directory path used for --install-dir option while running make-standalone-toolchain.sh which is a tool in Android NDK.

  It only happens while I compile FFmpeg for x86. ARM architecture is ok.