[FFmpeg-user] Which videoc codec gives best compression for screen recording?
Carl Eugen Hoyos
cehoyos at ag.or.at
Thu Nov 13 12:33:00 CET 2014
Tobias Rapp <t.rapp <at> noa-audio.com> writes:
> > Command line and complete, uncut console output
> > missing / which encoders did you already test?
> I tested FLV and MP4, see attached log.
Neither are encoders imo but see below.
> Stream #0:0: Video: flv1 (flv) ( / 0x0002), yuv420p
> Stream #0:0: Video: mpeg4 (  / 0x0020), yuv420p
I am surprised now:
You wrote originally "I want to do screen recording
[...] but the output file size is quite high".
I was assuming that you meant lossless encoding in
the rgb colourspace. For lossy encoding (flv1 and
mpeg4 only support lossy encoding), you can get a
smaller filesize by either specifying a lower bitrate
or requesting a higher constant quantizer.
As you already mentioned, the best lossy encoder
(with acceptable encoding speed) is x264.
If you want lossless encoding that keeps the original
colourspace (rgb), please test png, ffv1, (ff)huffyuv
and flashsv2. Then also test x264rgb with the lossless
option. (The filesizes may be very significantly
higher in all these cases than what you saw with the
lossy encodings you tested, this is not unexpected.
The files may be smaller depending on what you
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