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Autres articles (11)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Librairies et logiciels spécifiques aux médias

    10 décembre 2010, par

    Pour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
    Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)

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  • FFmpeg convert single image into video Android

    15 mai 2014, par berserk

    I am trying to convert a single image into a video using FFmpeg. I have tried following the files :

    "ffmpeg  -analyzeduration 2147483647 -probesize 2147483647 -i " + packat.get(i).path +"-r 25 -t 1000 -y op.mp4"
    

    
"ffmpeg -loop 1 -r 23.976 -i input.jpg -t 00:00:02 -vcodec qtrle -an output.mov"
    

    
"ffmpeg -i c:\rawvideo\mask.bmp -loop 1 -r 29.97 -s 720x480
    
        -aspect 4:3 -t 00:04:05 -vcodec mjpeg -vb 11261600 -an
    
        c:\rawvideo\fullmask.avi"

    But all of them give me this annoying error :

     Can not process SOS before SOF, skipping marker parser used 0 bytes (0 bits) decode frame unused 0 bytes decoding for stream 0 failed 
    
Could not find codec parameters for stream 0 (Video: mjpeg): unspecified size
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options /storage/sdcard0/cblVE/temp/0.jpg: could not find codec parameters 
    
exit_program: 1

    Please help. I have searched for a solution from a week, but I have found nothing.

  • Revision 72c5778ec5 : Added two new skip experiments. sf->unused_mode_skip_lvl. Tests modes as normal

    1er juillet 2013, par Paul Wilkins

    Changed Paths :
     Modify /vp9/encoder/vp9_encodeframe.c


     Modify /vp9/encoder/vp9_onyx_if.c


     Modify /vp9/encoder/vp9_onyx_int.h


     Modify /vp9/encoder/vp9_rdopt.c



    Added two new skip experiments.

    sf->unused_mode_skip_lvl. Tests modes as normal for all
    sizes at or below the given level. At larger sizes it skips
    all modes that were not chosen at any smaller size.
    Hence setting BLOCK_SIZE_SB64X64 is in effect off.
    Setting BLOCK_SIZE_AB4X4 will only consider modes that
    were chosen for one or more 4x4 blocks at larger sizes.

    sf->reference_masking.
    Do a test encode of the NONE partition at one size and create
    a reference frame mask based on the best rd choice. In the
    full search only allow this reference frame.
    Currently it is testing 64x64 and repeats this in the full search.
    This does not work well with Jim's Partition code just now and
    is disabled by default.

    Change-Id : I8f8c52d2ef4a0c08100150b0ea4155d1aaab93dd

  • lavu/riscv : add assembler macros for adjusting vector LMUL

    14 mai 2024, par Rémi Denis-Courmont
    lavu/riscv : add assembler macros for adjusting vector LMUL

    vtype_vli computes the VTYPE value with the optimal LMUL for a given
    
element width, tail and mask policies and a run-time vector length.
    

    vtype_ivli does the same, but with the compile-time constant vector
    
length.
    

    vwtypei and vntypei can be used to widen or narrow a VTYPE value for
    
use in mixed-width vector-optimised functions.
    • [DH] libavutil/riscv/asm.S

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