Am 01.04.2013 17:02, schrieb poma: > On 01.04.2013 14:03, Temlakos wrote: > ... >> >> No, but you have MP2 and MP3 sound-only files and MP4 videos. MP4 seems >> to be the download-of-choice from youtube.com, for example. > > - MPEG-1(2) Audio Layer II aka "MP2" > - MPEG-1(2) Audio Layer III aka "MP3" > - MPEG-4 Part 3 aka "MPEG-4 Audio" > - MPEG-4 Part 14 aka "MP4" is a multimedia container > for certain types of video, audio and subtitle tracks, > same as MKV(матрёшка) itself Youtube and anything which provides videos for web is using H.264/MPEG-4 Part 10 / AVC, to be specific H264 BASELINE PROFILE and nothing else in context of "MP4" because THIS is the spec which is supported by Smartphones, Tablets, mobile browsers up to Firefox on Android in recent releases and most hardware-devices including hardware acceleration http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC
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