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4

MPEG-2 doesn't seem to be an officially sanctioned codec for the Quicktime container. The official specification has a section related to MPEG-1 in MOV but not MPEG-2. The US Library of Congress also does not have an entry for the subtype MPEG-2 in MOV, like it does for MPEG-1 (just called QTV_MPEG). So, there's no official word on "allowable alternative ...


2

Strictly speaking, fourcc is the codec ID used by Microsoft. It has been adapted for use with many other formats, thus making it seem like a standardized ID format, but it's not. ffmpeg, in particular, seems to only consider XDCAM standard MPEG2 for inclusion in MOV. From the source code: else if (track->enc->codec_id == AV_CODEC_ID_MPEG2VIDEO) ...


0

Depending on the container format, multi-channel audio can either be in a single stream or in separate mono streams. Most consumer formats allow both, but it's easier for the end-user to have it in one stream (it can be interleaved PCM audio, or encoded bit-streams as ac3 or aac). Notice that it doesn't prevent to have several multi-channel streams in one ...


0

No, channels are conjoint, so they are part of a single stream. It is possible, using ffmpeg or similar software, to split channels into distinct streams. In which case, each stream will contain one channel.



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