[FFmpeg-user] Gnarly ffmpeg multi-stream demux challenge test clip

[David Favor]

Andy Sheen wrote:
> 
> Roger Pack wrote on Tue 04 Sep at 23:43 UK time
>>> The output video is uneditable by any software I have.
>>> No way to move videos from off the top of each other.
>> It seems from your youtube that it only "sees one side" in playback,
>> is that right?
>>
>>> The command I'm using for the extraction is:
>>>
>>>    ffmpeg -y -i foo.skype.mov -an -vcodec copy -map 0:2 -map 0:3
>>> foo.video.mov
>> What if you try .mkv?
>> What is the output of mediainfo for the resultant file?
>>
> 
> I had a quick look and it looks to me that the two videos would need
> some form of pan & scan vectors to be able to be two separate streams
> and appear side by side in the original capture. I'm not in any way
> familiar with the formats in use (is there anything other than H.264 and
> .mkvs teehee) but that's where I'd look to see if they were being
> dropped when the stream were copied. You'd get both videos decoding, but
> displaying on top of each other. This would match the fact you have 2
> video streams, but only one plays.
> 
> I don't know if mediainfo has this level of detail (or even if the
> streams are capable of supporting P&S in this way).

If you know a resource which talks about injecting pan + scan vectors
into .mov containers, pass along the link.

Thanks.

>> Cheers!
>> -r
> 
> Andy
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