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  • Pas question de marché, de cloud etc...

    10 avril 2011

    Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
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    Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
    Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
    le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
    Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
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  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
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Sur d’autres sites (7200)

  • FFMPEG concat causing audio glitches in segments boundaries

    28 mai 2017, par Idan

    I am segmenting a video file to 10sec segments, transcoding each of them and then run a concat to merge them all back together.
    While the whole process works without errors and the final file is valid and playable, I’ve noticed some sort of glitches/interruptions in the audio stream when passing over the original segments boundaries.

    For example, in a 60sec video that was segmented to 10sec segments and stitched back again, the final output will show audio interruptions in 10/20/30/40/50 sec timestamps.

    For segmenting the files I use :

    ffmpeg -y -i $INPUT_FILE -c copy -flags -global_header -segment_time 10 -break_non_keyframes 0 -reset_timestamps 1 -segment_list file_segs.list -segment_list_type ffconcat -write_empty_segments 0 -segment_format mp4  -f segment file_seg-%d.mp4

    And for concat I use :

    ffmpeg -y -f concat -i file_segs.list -c copy -movflags +faststart file_video.mp4

    Transcoding is to libx264 / aac

    What might be the cause ? Is there any way to work around this problem ?

  • FFMPEG concat causing audio glitches in segments boundaries

    28 mai 2017, par Idan

    I am segmenting a video file to 10sec segments, transcoding each of them and then run a concat to merge them all back together.
    While the whole process works without errors and the final file is valid and playable, I’ve noticed some sort of glitches/interruptions in the audio stream when passing over the original segments boundaries.

    For example, in a 60sec video that was segmented to 10sec segments and stitched back again, the final output will show audio interruptions in 10/20/30/40/50 sec timestamps.

    For segmenting the files I use :

    ffmpeg -y -i $INPUT_FILE -c copy -flags -global_header -segment_time 10 -break_non_keyframes 0 -reset_timestamps 1 -segment_list file_segs.list -segment_list_type ffconcat -write_empty_segments 0 -segment_format mp4  -f segment file_seg-%d.mp4

    And for concat I use :

    ffmpeg -y -f concat -i file_segs.list -c copy -movflags +faststart file_video.mp4

    Transcoding is to libx264 / aac

    What might be the cause ? Is there any way to work around this problem ?

  • How to convert ffmpeg command to ffmpeg-python

    1er décembre 2020, par Retro Pie

    Hello and thanks for reading.

    


    I have the following command : ffmpeg -i tmp.mp4 -loop 1 -i mask.png -filter_complex "[0:v]split [a][b];[a]transpose=1,crop=720:888:0:196,scale=876:1080,setdar=876/1080 [crop];[b]transpose=1,crop=720:888:0:196,scale=1920:1080,setdar=16/9,avgblur=76 [back];[1:v]alphaextract [mask];[crop][mask]alphamerge [masked];[back][masked]overlay=522:0" "out.mp4

    


    And I would like to convert it to ffmpeg-python syntax. So far I was able to come up with the bellow, but it far from ready :

    


    overlay_file = ffmpeg.input(mask)
(
ffmpeg
.input(tmp).split()
.overlay(overlay_file.hflip())
.alphaextract(),
.alphamerge(),
.output('out.mp4')
.run()
)


    


    Any help will be appreciated.

    


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