[FFmpeg-user] Generating v210 uncompressed AVIs from v210 individual files in 720p and 1080i formats
tim.nicholson at bbc.co.uk
Fri Sep 2 16:20:15 CEST 2011
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.
However Francois is using a very old version of ffmpeg.
> so, I don't think it's as simple as scaling each field vertically to
> 1080 lines because you will get that jittery effect due to the fields
> being out of "registration." If I remember correctly, there is a bob
> filter in VirtualDub that will perform a shift to better align the
> fields and get rid of most of the jitter. That's a necessary step, and
> unless you do it prior to encoding with FFmpeg I don't think it'll
> look right.
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated.
If you have received it in error, please delete it from your system.
Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately.
Please note that the BBC monitors e-mails sent or received.
Further communication will signify your consent to this.
More information about the ffmpeg-user