[FFmpeg-user] converting 1080 to 720 mpeg2

[Andy Sheen]

Ian Evans wrote on Tue 28 Feb at 9:07 UK time
> On Tue, Feb 28, 2012 at 4:05 AM, Andy Sheen <sheen.andy at googlemail.com> wrote:
>> Yes. I'm using one compiled Sept 15th 2011 and it still uses the "old"
>> command line style. The "c:v" format was introduced October/November
>> time last year IIRC.
>>
>> If you want to try the recode with the version you have, use:
>>
>> -vcodec rawvideo -vf scale=1280:720
>>
>> I think you can probably drop the rate setting (r:v 30/1.001) at least
>> for the test.
>>
>> As you're recoding to raw video, you do realise you will need LOTS of
>> disk space don't you?
> 
> 
> The original file from the OTA broadvast is about 26 gigs. Will the
> file be bigger than that or the same? I have about 89 gigs free.

My understanding of the raw video format is that it is exactly that -
raw video data so uncompressed. You might run out of space even with
your 10 minute test.

Have you seen what Myth makes of the two files just concatenated? They
are both MP2 transport streams so it should be possible (although you
might get errors at the transition).

I recode all my recorded shows as x264, why not try mpeg2 instead of
rawvideo? Ideally you need to get them to the same frame rate and size,
but as I said, Myth may just handle the two files concatenated.