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Autres articles (14)

  • 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 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 (...)

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

Sur d’autres sites (4249)

  • How to switch from yuyv422 to yuv420p for better framerate in ffmpeg on Windows 10

    14 mai 2019, par someone from belgium is called

    I upgraded PC from Windows 7 to Windows 10, as it is discontinued. Problem is,
    I had low latency monitoring and recording solution with FFmpeg.

    After the upgrade, Logitech camera switched from yuv420p to yuyv422 and I lost 30 fps support at 1280x720. Now it is only limited to 10 FPS.

    Tried different drivers, it still yuyv422

    Here is a code i use.

    ffmpeg -y -loglevel panic -hwaccel qsv -threads 1 -fflags nobuffer -flags low_delay -strict experimental -f dshow -video_size 1280x720 -framerate 10 -pixel_format yuyv422 -i video="C922 Pro Stream Webcam" -codec:v libx264 -preset ultrafast -crf 24 -tune zerolatency -map 0 -f segment -segment_time 600 -segment_wrap 2 -reset_timestamps 1 dvr_%%04d.avi -codec:v copy -f nut - | ffplay -fflags nobuffer -flags low_delay -vf scale=1920x1080:flags=lanczos -window_title "kamera" -noborder -left 1920 -top 150 -fast -framedrop -

    I really need low CPU, no latency monitoring at minimum 24 FPS and recording capabilities. File size doesn’t matter so much.

    Using mjpeg eats CPU like crazy.

  • FFmpeg script for linux and windows batch video encode different settings depending on video resolution [closed]

    28 décembre 2022, par Jaroslav Havel

    I'm looking for advice, help. I would like to convert all home videos to H265 using ffmpeg. Videos are in different formats and resolutions (3GP, mov, avi, mpg, mp4). I have an idea of which setting to set for which resolution, but I don't know how to write it all into a script (windows and linux). For these resolutions

    


    CRF 18-22 for <= 576p use 20
CRF 19-23 for > 576 and <= 720p use 21
CRF 20-24 for >720 and <= 1080p use 22
CRF 22-28 for >= 2160p 4K use 25


    


    For windows i have

    


    @ECHO OFF

FOR %%F IN ("*.*") DO (
     ffmpeg -i %%F -c:v libx265 -crf 20 -preset faster -profile:v main -pix_fmt yuv420p -acodec libmp3lame -b:a 192k %%~nF_new.mkv
)


    


    Big thanks for the help

    


  • How to Pause and Resume Screen Recording in FFmpeg on Windows ?

    24 mars, par Iman Sajadpur

    I use FFmpeg on Windows to record my screen. I want to pause and resume the recording properly.
I know that pressing Ctrl + S, Pause key on the Keyboard, or suspending FFmpeg via Resource Monitor stops the process, but screen recording conntinues in the background.
Here is an example of the command I use for screen recording :

    


    ffmpeg -f gdigrab -probesize 100M -i desktop -f dshow -channel_layout stereo -i audio="Microphone (2- High Definition Audio Device)" output.mp4

    


    How can I pause recording completely so that no frames are captured during the pause and resume it seamlessly ?

    


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