[FFmpeg-user] flag YUV input as interlaced

[bouke]

----- Original Message ----- 
From: "Mark Himsley" <mark at mdsh.com>
To: "FFmpeg user questions and RTFMs" <ffmpeg-user at ffmpeg.org>
Sent: Thursday, May 12, 2011 4:51 PM
Subject: Re: [FFmpeg-user] flag YUV input as interlaced


> On 12/05/11 14:11, bouke wrote:
>>
>> ----- Original Message -----
>> From: "Mark Himsley"<mark at mdsh.com>
>> To: "FFmpeg user questions and RTFMs"<ffmpeg-user at ffmpeg.org>
>> Sent: Thursday, May 12, 2011 2:13 PM
>> Subject: [FFmpeg-user] flag YUV input as interlaced
>>
>>
>>> Imagine I am using FFmpeg to read a raw YUV file. How do I flag that 
>>> input
>>> file as interlaced so that interlaced aware filters process the stream
>>> correctly?
>>>
>>> For instance:
>>>   I have an SD PAL sized yvyu422 file that I know is top-field-first
>>>   I want to output that as PAL DV 25, which is bottom-field-first
>>>
>>> I expect to use a command like like this:
>>>
>>> ffmpeg -f rawvideo -r 25 -s 720x576 -pix_fmt yuyv422 -i 
>>> input.yvyu422 -vf
>>> fieldorder=bff -vcodec dvvideo -pix_fmt yuv420p -y output.mov
>>
>> Normally you put the known input specs before the input file, as in your
>> example.
>> So did you test
>>   ffmpeg -f rawvideo -r 25 -s 720x576 -pix_fmt yuyv422  -vf
>> eldorder=tff   -i input.yvyu422 -vf fieldorder=bff -vcodec 
>> dvvideo -pix_fmt
>> yuv420p -y output.mov
>>
>> ?
>
> Hi Bouke,
>
> The -vf command is defining a filter, not setting switches on a file, so 
> that command does not work.

Doh!
Note to self, first think, then post....
Dirty trick, if you can spare a line, you could crop off one line at the 
top, and pad one line at the bottom.
That switches field dominance as well.

Bouke


> Thanks though.
>
>> Bouke
>>
>>> But, since the input file is not flagged as interlaced the fieldorder
>>> filter cannot do it's job.
>>>
>>> Thanks.
>>>
>>> --
>>> Mark
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