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Autres articles (38)

  • 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

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

Sur d’autres sites (7955)

  • vulkan_h264 : reject end_frame being called without valid session parameters

    20 mai 2023, par Lynne
    vulkan_h264 : reject end_frame being called without valid session parameters

    When seeking through MBAFF-coded H264, this can happen. Decoding calls end_frame
    
without calling start_frame. We are unable to decode this, as no frame
    
state has been set.
    

    Happens for both VAAPI and Vulkan. Could be an issue elsewhere, hence
    
the individual commit.
    • [DH] libavcodec/vulkan_h264.c

  • FFMPEG corruption concat

    11 avril 2017, par Please Help

    When I run

    ffmpeg -f concat -i resizedvideolist.txt -c copy concatenated_time.mp4 2>&1

    it concatenates all the videos in the txt, but there is one video around halfway through that get glitched out. The audio just doesn’t play for that video, but then starts playing on the next video, so it has been delayed. Then somewhere the audio managed to catch up and gets back in sync. Seems like some major corruption going on here.

    I do not know how to fix this as the codec is the same as all the other vidoes, H.264, it is an mp4 like the others. The individual video file runs fine as it is, and it already is in the same timescale, because before this ffmpeg command, I ran

    ffmpeg -i ./tempDownloadedMemes/$videoFileName -filter_complex 'scale=1080:-1,pad=1080:1080:(ow-iw)/2:(oh-ih)/2:0x2F2F2F' -video_track_timescale 15360 ./resizedVideos/resized_videoFileName 2>&1

    To be honest I don’t even know what timescale is, but I read that it needs to be the same for it to work. I deleted the video from the list, tried this same command, and the problem was gone at the same time in the video that it would have appeared. It seems like it is something to do with that one file itself. Any known issues/workarounds on concat bugs ? This is very important to me. Thanks.

  • How to concatenate multiple videos with ffmpeg while preserving each file's duration [closed]

    24 janvier 2024, par GaoJin

    I have several video clips. Let's say 10 clips.
I want to concatenate them all to one video.
The duration of video clips varies and when I get property with ffprobe it says.
11.37s, 10.7s, 6.67s, 12s, 9s ...
But after I concatenated them all, the duration of result video is a little longer than the sum of individual videos.

    


    And what bothers me is the moment when one video transitions to the next.
Sometimes the transition moment comes about 1 sec than it must be at(The moment get by calculation)

    


    I converted all video clips to constant 30 fps and h264.

    


    ffmpeg -y -i "D:\\output\\temp_clip0.mp4" -i "D:\\output\\temp_clip1.mp4" -i "D:\\output\\temp_clip2.mp4" -i "D:\\output\\temp_clip3.mp4" -i "D:\\output\\temp_clip4.mp4" -i "D:\\output\\temp_clip5.mp4" -i "D:\\output\\temp_clip6.mp4" -i "D:\\output\\temp_clip7.mp4" -i "D:\\output\\temp_clip8.mp4" -i "D:\\output\\temp_clip9.mp4" -i "D:\\output\\temp_clip10.mp4" -i "D:\\output\\temp_clip11.mp4" -i "D:\\output\\temp_clip12.mp4" -i "D:\\output\\temp_clip13.mp4" -i "D:\\output\\temp_clip14.mp4" -i "D:\\output\\temp_clip15.mp4" -filter_complex [0:v][1:v][2:v][3:v][4:v][5:v][6:v][7:v][8:v][9:v][10:v][11:v][12:v][13:v][14:v][15:v]concat=n=16:v=1[outv] -map [outv] concated.mp4


    


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