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• FFMPEG : Convert WebM VP8/VP9 multi-resolution video to MP4 (H.264)

  3 août 2020, par thedeadalive

  I have been trying to convert a multi-resolution WebM video ( VP9/VP8/H.264 ) (1280 x 1080 till the half, thereafter 1080 x 1280) to MP4 container with H.264 encoding for video.

  


  When transcoded with FFMPEG is locking into the frame size it's encountering at the start of the video (1280 x 1080 in this case) when transcoded with libvpx (for VP8 and VP9) and libx264 (for H264).

  


  The only instance i could get it right was when the Input WebM was having H.264 video and opus Audio, and ffmpeg was instructed to just copy the video stream and trans-code the Audio to aac only.

  


  Is there way in make ffmpeg support multi-resolution video transcoding ?

  


  How to generate a sample video : On a Chrome or Firefox (on a device that supports auto rotation and has different resolution on portrait and landscape) that supports mediaRecorder API goto this link : https://webrtc.github.io/samples/src/content/getusermedia/record/ , start recording a video , while recording the video, change orientation, stop recording and download the video. file)

  


  Discussion Reference : https://groups.google.com/a/webmproject.org/forum/# !topic/webm-discuss/IgumDyMAHY0

  


• Evolution #3147 : Interfacer la relecture temporaire

  14 janvier 2014, par tetue tetue

  Ok, j’ai copié-collé ce ticket dans le forum dudit plugin : http://contrib.spip.net/SPIP-Bonux#forum473270

• Revision 5650 : Report de la BoOz Google feature (cf : ...

  6 août 2011, par kent1 — Log

  Report de la BoOz ? Google feature (cf : ​http://zone.spip.org/trac/spip-zone/changeset/50220/_plugins_/forum) ... Un chouilla améliorée Diverses autres modifs