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  • Mise à jour de la version 0.1 vers 0.2

    24 juin 2013, par

    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
    Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)

  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

Sur d’autres sites (12108)

  • ffmpeg usage to encode a video to H264 codec format

    2 avril 2024, par goldenmean

    I have a *.mp4 video file(MPEG4 video codec) and I am trying to convert this to a H264 video codec format(raw h.264 format) using ffmpeg on Linux(Version - FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1, Copyright (c) 2000-2009 Fabrice Bellard,) using command line as shown below,

    



    ffmpeg -i input .mp4 output.h264 


    



    but I get an error saying -

    



    Unsupported codec for output stream #0.0


    



    Then when i try this option :

    



    ffmpeg -i input .mp4 -formats h264 output.h264 


    



    it still does not work, and gives -

    



    Seems stream 0 codec frame rate differs from container frame rate: 59.94 (5994/100) -> 29.97 (30000/1001)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Rapture.mp4':
  Duration: 00:02:06.44, start: 0.000000, bitrate: 26574 kb/s
    Stream #0.0(eng): Video: h264, yuv420p, 1920x1080, 29.97 tbr, 29.97 tbn, 59.94 tbc
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16


    



    And then it prints out help on the formats which we get when we do ffmpeg -formats

    



    When I checked the help, ffmpeg -formats, I see below information related to H264 file format and codec :

    



    File format : 

DE h264            raw H.264 video format

Codecs:

D V D  h264         H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10


    



    My questions :

    



      


    1. How can I convert the video to a H264 encoded video (raw H264 video format)

      2. 


    2. When I do ffmpeg -formats, I see many acronyms for the codecs supported, I see many acronyms before the codec name/type such as - D V D S E A, what do they stand for ?

      3. 


    3. How to use the ffmpeg options -vcodec and -formats ?

      4. 


    


  • encoding with ffmpeg libx265 -pix_fmt gray gives unplayable vid

    9 juin 2017, par netjiro

    What am I missing ?
    I encode an old black and white film clip with ffmpeg libx265 passing -pix_fmt gray. The output is unplayable in both vlc and mplayer (linux), so I assume I’m missing something...

    encoding :

    ffmpeg -i clip.mkv \
    
    -c:v libx265 -preset slow -x265-params "crf=24" -pix_fmt gray \
    
    -c:a libopus -b:a 64k \
    
    -c:s copy \
    
    out.mkv

    vlc errors :

    [00007f8a3ddfe328] blend blend error: no matching alpha blending routine (chroma: RGBA -> GREY)
    
[00007f8a3ddfe328] core blend error: blending RGBA to GREY failed
    
... repeated ...

    mplayer errors :

    Unexpected decoder output format Planar Y800
    
... repeated ...

    ffmpeg encoding output :

    ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 4.9.4 (Gentoo 4.9.4 p1.0, pie-0.6.4)
    
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-3.2.4/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-march=native -O2 -pipe' --disable-static --enable-avfilter --enable-avresample --disable-stripping --enable-nonfree --enable-version3 --disable-indev=oss --disable-indev=jack --disable-outdev=oss --enable-version3 --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --disable-gnutls --disable-gmp --enable-gpl --enable-hardcoded-tables --enable-iconv --enable-lzma --enable-network --enable-openssl --enable-postproc --disable-libsmbclient --enable-ffplay --enable-sdl2 --enable-vaapi --enable-vdpau --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --enable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --enable-openal --enable-opengl --enable-libv4l2 --disable-libpulse --enable-libopencore-amrwb --enable-libopencore-amrnb --disable-libfdk-aac --enable-libopenjpeg --enable-libbluray --enable-libcelt --disable-libgme --disable-libgsm --disable-mmal --enable-libmodplug --enable-libopus --disable-libilbc --disable-librtmp --enable-libssh --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libvpx --disable-libzvbi --disable-libbs2b --disable-chromaprint --disable-libebur128 --disable-libflite --disable-frei0r --disable-libfribidi --enable-fontconfig --disable-ladspa --disable-libass --enable-libfreetype --disable-librubberband --disable-libzimg --enable-libsoxr --enable-pthreads --enable-libvo-amrwbenc --enable-libmp3lame --disable-libkvazaar --disable-nvenc --disable-libopenh264 --enable-libsnappy --enable-libtheora --enable-libtwolame --enable-libwavpack --disable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=host --disable-doc --disable-htmlpages --enable-manpages
    
  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
    
x265 [info]: HEVC encoder version 2.2
    
x265 [info]: build info [Linux][GCC 4.9.4][64 bit] 8bit+10bit+12bit
    
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
    
x265 [info]: Unknown profile, Level-3.1 (Main tier)
    
x265 [warning]: No thread pool allocated, --wpp disabled
    
x265 [warning]: No thread pool allocated, --lookahead-slices disabled
    
x265 [info]: Slices                              : 1
    
x265 [info]: frame threads / pool features       : 3 / none
    
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
    
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
    
x265 [info]: ME / range / subpel / merge         : star / 57 / 3 / 3
    
x265 [info]: Keyframe min / max / scenecut / bias: 23 / 250 / 40 / 5.00
    
x265 [info]: Lookahead / bframes / badapt        : 25 / 4 / 2
    
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
    
x265 [info]: References / ref-limit  cu / depth  : 4 / on / on
    
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 1 / 1.0 / 32 / 1
    
x265 [info]: Rate Control / qCompress            : CRF-24.0 / 0.60
    
x265 [info]: tools: rect limit-modes rd=4 psy-rd=2.00 rdoq=2 psy-rdoq=1.00
    
x265 [info]: tools: rskip signhide tmvp strong-intra-smoothing deblock sao
    
Output #0, matroska, to 'out.mkv':
    
  Metadata:
    
    encoder         : Lavf57.56.101
    
    Metadata:
    
    Stream #0:0(eng): Video: hevc (libx265), gray, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 1k tbn, 23.98 tbc (default)
    
    Metadata:
    
      encoder         : Lavc57.64.101 libx265
    
    Stream #0:1(eng): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, stereo, flt, 64 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc57.64.101 libopus
    
    Stream #0:2(eng): Subtitle: subrip (default)
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
    
  Stream #0:1 -> #0:1 (eac3 (native) -> opus (libopus))
    
  Stream #0:3 -> #0:2 (copy)
    
Press [q] to stop, [?] for help
    
frame= 1439 fps=7.0 q=-0.0 Lsize=    5356kB time=00:01:00.01 bitrate= 731.1kbits/s speed=0.294x    
    
video:4940kB audio:382kB subtitle:1kB other streams:0kB global headers:2kB muxing overhead: 0.629434%
    
x265 [info]: frame I:      9, Avg QP:22.27  kb/s: 6064.82 
    
x265 [info]: frame P:    340, Avg QP:23.62  kb/s: 1950.21 
    
x265 [info]: frame B:   1090, Avg QP:29.65  kb/s: 230.75  
    
x265 [info]: Weighted P-Frames: Y:0.9% UV:0.0%
    
x265 [info]: consecutive B-frames: 2.9% 0.3% 1.4% 72.5% 22.9%

  • Is it possible to create new mp4 file from a single streaming byte range chunk ?

    11 janvier 2021, par bevinlorenzo

    If I have a remote mp4 file on a server that supports Byte Ranges, is it possible to retrieve a single byte range and create a new/self-contained mp4 from that range data ?

    



    If I try and write a returned byte range data directly to an mp4 file using fs.createWriteStream(remoteFilename) it doesn't get the video meta data (duration, dimensions, etc) that it needs to be playable.

    



    When I get a byte range that starts with 0 and ends with XX the output mp4 is playable, but will have the duration meta-data of the entire video length and will freeze the screen when the byte range is done for the remainder of the duration time.

    



    How else can I take a byte range and create a stand-alone .mp4 file from that stream object ?

    



    The whole point of this is to avoid downloading the entire 10 minute file before I can make a 5 second clip using ffmpeg. If I can calculate and download the byte range, there should be a way to write it to a standalone mp4 file.

    



    Thanks in advance for any help you can provide.

    


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