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    Le lecteur ne fonctionne pas sur Internet Explorer
    Sur Internet Explorer (8 et 7 au moins), le plugin utilise le lecteur Flash flowplayer pour lire vidéos et son. Si le lecteur ne semble pas fonctionner, cela peut venir de la configuration du mod_deflate d’Apache.
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Sur d’autres sites (9217)

  • How to create a blank mp3 using ffmpeg ?

    11 mai 2017, par Vrushank Upadhyay

    I have built ffmpeg for android by using android NDK. I am using cocos game-engine to compile and run the project. I want to create a blank mp3 of lets say 20 seconds when a button is pressed. I have tried almost everything. The following command generates an output file but it is of 0 bytes.

    ffmpeg -f lavfi -i anullsrc=r=48000 -t 20 -codec copy /sdcard/output.mp3

    My ffmpeg configuration is :

    > ./configure \
    
>     --prefix=$PREFIX \
    
>     --disable-network \
    
>     --disable-doc \
    
>     --disable-ffplay \
    
>     --disable-ffprobe \
    
>     --disable-ffserver \
    
>     --disable-symver \
    
>     --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    
>     --target-os=linux \
    
>     --arch=arm \
    
>     --enable-cross-compile \
    
>     --sysroot=$SYSROOT \
    
>     --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
    
>     --extra-ldflags="$ADDI_LDFLAGS" \

    Any help would be appreciated. I am testing this on an android phone. I have built static libraries for ffmpeg and they are linked to the project.

  • MPlayer not playing HTTP video stream for a specific type of content from the same source

    2 août 2017, par Joel

    Implementation overview

    Before I dive into the question, I need to establish the context from the start.

    I am currently implementing a cloud gaming solution utilising the following :

    • Nvidia Capture SDK
    • Nvidia Video Codec SDK
    • FFmpeg
    • MPlayer

    The Nvidia Capture SDK is used to produce a shim layer (via DXGI.dll), intercepting and capturing DirectX frames so that they can be passed to the Nvidia Video Codec SDK to be encoded into an h264 video format. All this is done within DXGI.dll.

    I then pass the encoded video to FFmpeg. FFmpeg acts as an HTTP server that broadcasts the video stream for MPlayer to play.

    Problem

    I am running an Unreal Engine 4 game called "Epic Survival Game Series". The Nvidia Capture SDK’s shim layer kicks off when the game starts, and FFmpeg launches the HTTP server to start streaming. However, when I start MPlayer to receive the stream, MPlayer stops at the following message, and nothing happens after that.

    libavformat version 57.72.101 (internal)
    Stream not seekable!
    H264-ES file format detected

    The thing is, when I play the same video using ffplay, it works without any issue. This is not the only quirk. When I launch a different Unreal Engine 4 game called "First Person Shooter Template", MPlayer can play that video as well. Also, if I modify the Survival Game to load directly into the game level by skipping the menu, MPlayer is also able to play the video.

    Using FFmpeg to write the video to a file instead of streaming it to a video also works, no matter the game or whether I loaded into the menu or game level.

    This is very strange and I do not have any idea why this is the case. Any ideas ?

    Edit : One strange quirk I forgot to mention is that MPlayer does manage to play the video in very rare occasions - maybe once every 10-20 tries or so.

    Implementation Details

    Additional details of how certain parts are implemented.

    (1) For the Nvidia Capture SDK, I use the provided DXIFRShim example that is provided in the SDK

    (2) for the Nvidia Video Codec SDK, I use the provided NvEncoder example that is provided in the SDK

    (3) The FFmpeg command I use is this :
    ffmpeg -i - -listen 1 -threads 1 -vcodec copy -preset ultrafast -an -tune zerolatency -f h264 http://address:port
    The encoded frames from Nvidia Video Codec SDK is piped to FFmpeg.

    (4) The MPlayer command I use is this :
    mplayer -quiet -vo gl -nosound -benchmark http://address:port

    Things I’ve tried

    I am suspecting MPlayer to be the cause, so I’ve only played around with MPlayer parameters.
    mplayer http://address:port

    mplayer -fps 30 -vo gl -nosound -benchmark http://address:port

    mplayer -fps 30 -screenw 720 -screenh 1280 -vo gl -nosound -benchmark http://address:port

    mplayer -fps 30 -vo directx -nosound -benchmark http://address:port

    mplayer -fps 30 -vo null -nosound -benchmark http://address:port

    None of these worked.

  • Converting mp3 files to ogg vorbis while retaining cover art using FFmpeg

    22 juin 2017, par refi64

    Title says it all. I’ve tried :

    ffmpeg -i 01_FFXV_OST.mp3 -c:a libvorbis 01_FFXV_OST.ogg

    but I get :

    ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 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 --enable-libwavpack --enable-nvenc
    
  libavutil      55. 44.100 / 55. 44.100
    
  libavcodec     57. 75.100 / 57. 75.100
    
  libavformat    57. 63.100 / 57. 63.100
    
  libavdevice    57.  2.100 / 57.  2.100
    
  libavfilter     6. 69.100 /  6. 69.100
    
  libavresample   3.  2.  0 /  3.  2.  0
    
  libswscale      4.  3.101 /  4.  3.101
    
  libswresample   2.  4.100 /  2.  4.100
    
  libpostproc    54.  2.100 / 54.  2.100
    
Input #0, mp3, from '01_FFXV_OST.mp3':
    
  Metadata:
    
    album           : FINAL FANTASY XV Original Soundtrack
    
    artist          : Yoko Shimomura
    
    album_artist    : SQUARE ENIX MUSIC
    
    composer        : Yoko Shimomura
    
    disc            : 1
    
    genre           : Game
    
    title           : Somnus (Instrumental Version)
    
    track           : 01
    
    date            : 2016
    
  Duration: 00:02:29.47, start: 0.023021, bitrate: 306 kb/s
    
    Stream #0:0: Audio: mp3, 48000 Hz, stereo, s16p, 301 kb/s
    
    Metadata:
    
      encoder         : LAME3.98r
    
    Stream #0:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 500x500 [SAR 100:100 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
    
    Metadata:
    
      comment         : Cover (front)
    
Automatic encoder selection failed for output stream #0:0. Default encoder for format ogg (codec theora) is probably disabled. Please choose an encoder manually.
    
Error selecting an encoder for stream 0:0

    Adding on -c:v copy does...nothing :

    ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 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 --enable-libwavpack --enable-nvenc
    
  libavutil      55. 44.100 / 55. 44.100
    
  libavcodec     57. 75.100 / 57. 75.100
    
  libavformat    57. 63.100 / 57. 63.100
    
  libavdevice    57.  2.100 / 57.  2.100
    
  libavfilter     6. 69.100 /  6. 69.100
    
  libavresample   3.  2.  0 /  3.  2.  0
    
  libswscale      4.  3.101 /  4.  3.101
    
  libswresample   2.  4.100 /  2.  4.100
    
  libpostproc    54.  2.100 / 54.  2.100
    
Input #0, mp3, from '01_FFXV_OST.mp3':
    
  Metadata:
    
    album           : FINAL FANTASY XV Original Soundtrack
    
    artist          : Yoko Shimomura
    
    album_artist    : SQUARE ENIX MUSIC
    
    composer        : Yoko Shimomura
    
    disc            : 1
    
    genre           : Game
    
    title           : Somnus (Instrumental Version)
    
    track           : 01
    
    date            : 2016
    
  Duration: 00:02:29.47, start: 0.023021, bitrate: 306 kb/s
    
    Stream #0:0: Audio: mp3, 48000 Hz, stereo, s16p, 301 kb/s
    
    Metadata:
    
      encoder         : LAME3.98r
    
    Stream #0:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 500x500 [SAR 100:100 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
    
    Metadata:
    
      comment         : Cover (front)
    
[ogg @ 0x2ac6e00] Unsupported codec id in stream 0
    
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
    
Stream mapping:
    
  Stream #0:1 -> #0:0 (copy)
    
  Stream #0:0 -> #0:1 (mp3 (native) -> vorbis (libvorbis))
    
    Last message repeated 1 times

    I have absolutely no clue what to do next. I’ve also tried adding -c:v copy to no avail :

    ffmpeg version git-2017-01-22-f1214ad Copyright (c) 2000-2017 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 --enable-libwavpack --enable-nvenc
    
  libavutil      55. 44.100 / 55. 44.100
    
  libavcodec     57. 75.100 / 57. 75.100
    
  libavformat    57. 63.100 / 57. 63.100
    
  libavdevice    57.  2.100 / 57.  2.100
    
  libavfilter     6. 69.100 /  6. 69.100
    
  libavresample   3.  2.  0 /  3.  2.  0
    
  libswscale      4.  3.101 /  4.  3.101
    
  libswresample   2.  4.100 /  2.  4.100
    
  libpostproc    54.  2.100 / 54.  2.100
    
Input #0, mp3, from '01_FFXV_OST.mp3':
    
  Metadata:
    
    album           : FINAL FANTASY XV Original Soundtrack
    
    artist          : Yoko Shimomura
    
    album_artist    : SQUARE ENIX MUSIC
    
    composer        : Yoko Shimomura
    
    disc            : 1
    
    genre           : Game
    
    title           : Somnus (Instrumental Version)
    
    track           : 01
    
    date            : 2016
    
  Duration: 00:02:29.47, start: 0.023021, bitrate: 306 kb/s
    
    Stream #0:0: Audio: mp3, 48000 Hz, stereo, s16p, 301 kb/s
    
    Metadata:
    
      encoder         : LAME3.98r
    
    Stream #0:1: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 500x500 [SAR 100:100 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
    
    Metadata:
    
      comment         : Cover (front)
    
[ogg @ 0x2b6ce00] Unsupported codec id in stream 0
    
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
    
Stream mapping:
    
  Stream #0:1 -> #0:0 (copy)
    
  Stream #0:0 -> #0:1 (mp3 (native) -> vorbis (libvorbis))
    
    Last message repeated 1 times

    I get the same results if I change the stream order (by passing -map 0:0 -map 0:1). I’m not sure what to do next...

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