[FFmpeg-user] Huffyuv huge files?
rogerdpack2 at gmail.com
Thu Jan 29 20:30:50 CET 2015
On 1/29/15, Christoph Gerstbauer <christophgerstbauer at gmail.com> wrote:
>> Hello. I noticed when attempting to use Huffyuv for screen capture,
>> that, even for a nonmoving image [screen in this case] it generates
>> *huge* files, even if the GOP is set high. I would have expected it
>> to be a bit smarter in compression.
>> I see on this; http://lags.leetcode.net/codec.html the lagarith guys
>> mentioning that huffyuv has a "Predict Median" option. I wonder if
>> that is an option that would really help out [somebody on a windows
>> computer test this out for me?]
>> I'm just really confused why Huffyuv is *so* huge when it's
>> recompressing the same frame over and over again.
>> Any other advice quite welcome.
>> refs: http://www.virtualdub.org/blog/pivot/entry.php?id=203
>> UPDATE just saw this:
>> http://wiki.multimedia.cx/index.php?title=HuffYUV which implies that
>> every frame in HuffyUV is an I-frame. This explains it, sorry for the
>> noise here, still posting it for followers, feedback also welcome.
> Hi Roger, yes huffyuv is only I-frame format.
> I would try ffv1 instead. compresses better. and ffv1 uses only i-frames
> when you set it via "-g 1".
> More compression you will get if you use yuv420p instead of yuv422p like
> huffyuv does.
> Or are you using RGB?
Yeah it is typically RGB, though probably can be converted easily. I
would use FFV1, just looking for the "fastest" thing out there, as it
were, for screen capture [though I'll adming libx264 with its fast
mode is actually pretty fast, though lossy].
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