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  • 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 (...)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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 (...)

Sur d’autres sites (6875)

  • Converting AAC stream to DASH MP4 with high fragment length precision

    5 mars 2017, par vdudouyt

    For my HTML5 project I need to create a fragmented MP4 file with a single audio stream (no video), each fragment of which has a duration of exactly 0.1 second.

    Accordingly to ffmpeg docs, you can accomplish that by passing a value in microseconds with ’-frag_duration’ - which I found to be working and playable with HTML5 MediaSource API :

    $ ffmpeg -y -i input.aac -c:a libfdk_aac -b:a 64k -level:v 13 -r 25 -strict experimental -movflags empty_moov+default_base_moof -frag_duration 100000 output.mp4

    As we have a 210 second audio split up by 0.1s fragments, I expect that in output.mp4 we’d have 2100 fragments, hence 2100 moof atoms. But, upon inspecting it I’ve figured out that we only have 1811 moof atoms - which means that some (or maybe even all) fragments are bigger than expected :

    $ python ~/git/mp4viewer/src/showboxes.py output.mp4 |grep moof|wc -l
    
1811

    Could anybody tell me what’s wrong, and how could I accomplish what I want ?

    Right now my assumption is that during an encoding I have AAC frame length which is not a multiple of 0.1s, hence ffmpeg has no chance to produce the fragments that are strictly equal to 0.1s but I’m not sure. If somebody can confirm that - and let me know a way to explicitly set AAC frame_size in FFMPEG (I couldn’t find anything like that in the docs), or completely disprove this - it would be also highly appreciated.

  • FFmpeg.AutoGen decoding an image using av_image_copy_to_buffer

    28 juin 2022, par Steve

    I try to use FFmpeg.AutoGen.av_image_copy_to_buffer to get decoded data into my application defined frame_buffer like so :

    


    bytes_decoded = ffmpeg.av_image_copy_to_buffer(frame_data, buffer_size, frame->data, frame->linesize, 
                                               codCtx->pix_fmt, codCtx->width, codCtx->height, 1);


    


    However the type of the parameter frame->data is of type FFmpeg.AutoGen.byte_ptrArray8, but the interface expects FFmpeg.AutoGen.byte_ptrArray4.
Does anyone know how to convert this parameter, so that I can pass it to the interface ? VS complains with the following error message :
https://docs.microsoft.com/en-us/dotnet/csharp/misc/cs1503?f1url=%3FappId%3Droslyn%26k%3Dk(CS1503)

    


    Thanks in advance for any help on this issue.

    


  • Composite 2 video(.mov) files using ffmpeg

    20 octobre 2012, par eco_bach

    Novice user of ffmpeg but going thru whatever docs I can find online.

    For a current project I will need to composite 2 videos together to create a .flv file.

    Does anyone know the commands to do this ?

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