[FFmpeg-user] Generating v210 uncompressed AVIs from v210 individual files in 720p and 1080i formats

[Tim Nicholson]

On 04/09/11 10:12, Mark Himsley wrote:
> On 02/09/2011 15:20, Tim Nicholson wrote:
>> On 02/09/11 15:07, Thomas Worth wrote:
>>> On Fri, Sep 2, 2011 at 6:50 AM, FrancoisMace<mace.francois at gmail.com>   wrote:
>>>> Hello Tim,
>>>>
>>>> Thanks for your quick answer.
>>>>
>>>> Indeed, my output image was specified as being 1920x540 since, when I
>>>> specified 1920x1080, one hald of the ouptut AVI displayed completely green.
>>
>> Because you only supplied 540 lines of input...
>>
>>>>
>>>> So the command line was there in order to illustrate what I manage to get
>>>> working, although what is slipping out of your mind correspond to what I
>>>> have tried to get.
>>>>
>>>> The only notions of "interlacing" I found in the ffmpeg documentation seem
>>>> to be related to the use of the AVC encoder/decoders which, since I am
>>>> wanting to do an uncompressed AVI, do not interest me.
>>>
>>> It sounds like you are trying to extract fields from an interlaced
>>> video and convert them to progressive (50i -->   50p). Am I correct? If
>>
>> Thomas I think he has already extracted the individual fields and they
>> now exist as discrete image files. Now he wants to turn them back into
>> an interlaced video.
>>
>> ISTR that mencoder managed that somewhat better than ffmpeg, but now
>> ffmpeg supports mencoder filters it may be possible directly. I think
>> having the input rate twice the output rate was involved somewhere.
>>
>> Someone must remember.
>
> I haven't completely understood Francois' requirements, but if Francois
> is wanting to convert frames into fields then that's what the tinterlace
> filter does. There's the version in FFmbc, there's the version in the mp
> filters of FFmpeg (and therefore also in mencoder), and there's the
> patch that Stefano has posted to ffmpeg-devel - and which he said "I'm
> going to apply the patch in a few days if I see no comments..." a few
> days ago.
>

Tinterlace...that's the one. I knew my memory wasn't completely 
fubar....(just could not for the life of me remember its name, just knew 
it was a mencoder one.)


> If I've understood right, Francois has half-height frames that he wants
> to interlace, then he'll want tinterlace mode 0: "Move odd frames into
> the upper field of the new frame, even into the lower field, generating
> a double height frame at half framerate"
>
>
>>
>> However Francois is using a very old version of ffmpeg.
>>
>
> True enough.
>


-- 
Tim

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