[FFmpeg-user] FFv1 interlaced
pb at das-werkstatt.com
Tue May 28 16:04:13 CEST 2013
Quoting "Peter B." <pb at das-werkstatt.com>:
> Quoting Carl Eugen Hoyos <cehoyos at ag.or.at>:
>> You can test if such a mode would help compression:
>> $ ffmpeg -i interlaced -vcodec ffv1 out1.avi
>> $ ffmpeg -i interlaced -vf il=d:d -vcodec ffv1 out2.avi
> Interesting filter. Didn't know that one.
> Will check this.
I've tested compression performance and the files are sometimes
smaller, sometimes bigger.
I ran it on 4 files:
1) 1min documentary (anamorphic Digibeta material)  - (9 MB bigger)
2) 1min interview (anamorphic Digibeta material) - (5 MB bigger)
3) 1min low-motion "Heldenplatz" (VHS)  - (15 MB smaller)
4) 10min holiday/family video (many cuts) (VHS) - (300 MB smaller)
Encoding the deinterleaved fields were bigger with Digibeta and
smaller with VHS.
Therefore I concur with you, that with this kind of compression the
impact of differing between progressive/interlaced encoding seem
negligible. I've also compared FFv1.1 vs FFv1.3: Approximately same
The compression gained there is probably not worth the hassle of
having an interlaced-mode.
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