Freebox V5 HD

Concerne le projet: Freebox V5 HD
Ouverte par Underground78 - 10/07/2010
Dernière modification par nitro - 26/04/2011

Bonjour,

Certains fichiers créés en utilisant MkvMerge 4.1.1 ne sont pas lisibles correctement sur la Freebox (problème de son et de pixelisation) alors qu’ils fonctionnent très bien sur PC. Je pense que ça vient de cette modification :

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The Matroska specifications know a feature called “header removal compression”. This allows a muxer to keep a certain number of bytes that are identical for each frame in the track headers removing them from the individual frames. This reduces the size of the tracks significantly without altering the content as a demuxer can add the bytes found in the track headers to each frame during demuxing.

Starting with v4.1.0 mkvmerge uses header removal compression for a couple of track types by default. These include AC3, DTS and MP3 audio tracks as well as Dirac and MPEG-4 part 2 (aka. XviD/DivX) video tracks.

If your player has difficulties playing such files then it is a bug in that player or in the demuxer but not in mkvmerge. This feature has been part of the Matroska specification since more than six years, and there’s no excuse for refusing to add support for it.

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Voici deux samples (Xvid + MP3) permettant de reproduire le problème sur la box :
- fichier créé avec MkvMerge 3.1.0 fonctionnant parfaitement sur la box : http://dl.free.fr/pFGdNzSU8/mkvmerge.3.1.0.mkv - fichier crée avec MkvMerge 4.1.1 posant problème sur la box : http://dl.free.fr/qYruJs8Xl/mkvmerge.4.1.1.mkv

Cordialement,
Underground78