What I wrote is for xvid and x264 (x264 need slightly less than xvid)
Am 14.09.2010 20:40, schrieb Kulti: > Thank you, Benjamin! > > I was doing any similar, but used 3 bits/pixel instead 0.22. At now I try to > 0.22 and quality is very bad. As I understand optimal bpp depends on > compression format. For uncompressed RGB needed 24 bpp, but how to know, > what's optimal for concreate codec? > > On Tue, Sep 14, 2010 at 1:46 PM, Benjamin Gretsch <[email protected]> wrote: > >> For average to good quality you should have between 0.15 and 0.22 >> bits/pixel >> (bpp). >> Use the formula >> bpp = bps / (width * height * fps) >> <=> bps = bpp * width * height * fps >> >> bps is bits/s (bitrate), fps is frames/s >> >> >> Am 14.09.2010 11:26, schrieb Kulti: >>> Hi, all. >>> >>> I used add_video_stream() function from output_example.c for >>> tuning AVCodecContext. bit_rate field is set to some value, but I can't >>> understand what value I need? How to calculate output bit-rate for my >>> concrete format and width x hight? >>> >>> May be ffmpeg can automatically set optimal bit-rate? I try to set this >>> field to 0, but it was not work. >>> _______________________________________________ >>> libav-user mailing list >>> [email protected] >>> https://lists.mplayerhq.hu/mailman/listinfo/libav-user >>> >> _______________________________________________ >> libav-user mailing list >> [email protected] >> https://lists.mplayerhq.hu/mailman/listinfo/libav-user >> > _______________________________________________ > libav-user mailing list > [email protected] > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
