[FFmpeg-user] Inverse Telecine with fieldmatch filter

L. Lee llee040 at sbcglobal.net
Wed Jun 26 16:17:08 CEST 2013

On 6/26/13 9:00 AM, "Carl Eugen Hoyos" <cehoyos at ag.or.at> wrote:

>L. Lee <llee040 <at> sbcglobal.net> writes:
>> For 720p I used your suggestion to interlace and deinterlace:
>(I should add that I meanwhile realized it may be
>faster to use fps=30000/1001 instead of interlace)

You're not suggesting that the output file should be 30 fps, are you?

>> >> but also to make a conversion of the 6-channel AC-3
>> >> for the first audio track (stereo aac), then copy the
>> >> source audio into an additional audio track (6-channel AC-3)
>> ffmpeg -i /720p_clip.mpg -vf
>> "crop=1264:528:6:100,interlace,fieldmatch=order=tff:combmatch=full,
>> yadif=deint=interlaced, decimate" -pix_fmt yuv420p
>> -c:v libx264 -preset slower -tune film -crf 18
>> /Output_720p_clip.mp4
>What I don't understand is that you apparently have
>specific needs about how the audio should look
>like in the output file but you don't tell FFmpeg...

Well, that's easy to explain. I just don't know much about how to talk to
FFmpeg yet. I know that for MEncoder, an option ("-o") is needed to
specify an output file, while for FFmpeg an option ("-i") is instead
required to specify an input file. Beyond that I'm mostly guessing.

>What about the following?
>$ ffmpeg -i file -acodec aac -ac 2 -strict -2 -acodec copy out.mp4
>(This may not work as-is but you can at least
>start testing)
>Carl Eugen


Laine Lee

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