Re: HD capture question

On Sun, Apr 25, 2010 at 6:42 AM, Richard Rasker <[email protected]> wrote:
> Op dinsdag 30-03-2010 om 20:08 uur [tijdzone +0200], schreef Richard
> Rasker:
>> Op vrijdag 26-03-2010 om 16:04 uur [tijdzone -0700], schreef Dan
>> Dennedy:
>> > On Fri, Mar 26, 2010 at 8:04 AM, Richard Rasker <[email protected]> wrote:
>> > > Op dinsdag 23-03-2010 om 18:00 uur [tijdzone -0500], schreef Daniel
>> > > Jircik:
>> > >> Kino does not support hdv. Try kdenlive which is based on the melt
>> > >> library which plays just about anything. Kino is no longer developed.
>> > >> Ciao
>> > >> Daniel
>> > >
>> > > Hm, I tried rendering the .mov file to raw DV using Kdenlive, but I
>> > > still get a rather choppy result -- even though Kdenlive didn't come up
>> > > with any warnings or error messages. It isn't quite as bad a Kino's
>> > > rendering, but it's unusable all the same.
>> >
>> > Maybe you chose the wrong project setting.
>> >
>> > > Is there perhaps a recent CLI tool for properly transcoding this H.264
>> > > beastie to a more open format, so that I get to see exactly what's going
>> > > on? Sorry if I sound terribly uninformed, but I have no experience with
>> > > HD content whatsoever.
>> >
>> > The following works beautifully with the sample you provided:
>> >
>> > $ melt -profile dv_ntsc_wide file0034.mov -consumer
>> > avformat:file0034.dv pix_fmt=yuv411p
>> >
>> > Note the default profile is PAL DV, which does not match your input's
>> > aspect ratio and frame rate, hence the dv_ntsc_wide. Then, ffmpeg
>> > requires the pix_fmt hint to tell it which DV variant to use (dv25).
>>
>> OK, thanks, this clarifies things -- and it turns out that Mandriva
>> 2008.1 doesn't have the melt library, but it to work just fine on
>> version 2010. At least I now have a point of departure for further
>> endeavours in the realm of HD video :-)
>
> Hello Dan, others,
> I've played around a bit with melt and the CLI command which indeed
> gives a great result for the .mov files recorded with this camera.
>
> I still have one remaining question to which I can't find an (easy)
> answer: how can I figure out which settings to use for a particular
> video file? I guess all necessary information is found in the video
> file's headers, but the question is how to extract it. Is there a
> command to analyze an arbitrary video file, or at least retrieve and
> display header information in a human-readable format? Is there perhaps
> a Web page with some more in-depth information about this?
>
> Thanks once again, best regards,
>
> Richard Rasker

You can gleam a decent amount of information using 'melt file -consumer xml'.
Also, historically, 'ffmpeg - i file' gives some info with 'ffprobe
file' being the new kid on the block.

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