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  • 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
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  • 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 (7302)

  • How to resize a video with FFMPEG so that it has a max size, horizontal or vertical, without losing aspect ratio ?

    24 septembre 2024, par ipartola

    There are lots of questions on SO about resizing video but they all seem to assume orientation. Let's say that I am ingesting user videos and sometimes they are horizontal and sometimes vertical. I'd like to downscale them to at most 1920x1080 or 1080x1920, depending on orientation, but never upscale. I can't examine videos ahead of time so I am looking for a filter command that will do all this logic in one go. Anyone have anything like this handy ?

    


  • How can we merge two video in which one is horizontal resolution and other one is vertical resolution without stretching it using ffmpeg ?

    26 février 2021, par Rohan Patil

    I want to make an application that merge two video, in which one video is of vertical resolution and other one is of horizontal resolution. I managed to merge but it leads to stretching of video which ideally shouldn't happen. Does anyone have any idea to do this ? Thank you !

    



    command = new String[]{"-y", "-i", video1.mp4, "-i", video2.mp4,"-strict", "experimental", "-filter_complex",
            "[0:v]scale=1920x1080,setdar=4:3[v0];[1:v]scale=1920x1080,setdar=4:3[v1];[v0][0:a][v1][1:a] concat=n=2:v=1:a=1",
            "-ab", "48000", "-ac", "2", "-ar", "22050", "-s", "1920x1080", "-vcodec", "libx264", "-crf", "27", "-q", "4", "-preset", "ultrafast",output.mp4};


    


  • avfilter/vf_xfade : add horizontal and vertical wind transforms

    21 mai 2023, par Paul B Mahol
    avfilter/vf_xfade : add horizontal and vertical wind transforms
    • [DH] doc/filters.texi
    • [DH] libavfilter/vf_xfade.c

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