[FFmpeg-user] Lossless x264
Henk D. Schoneveld
belcampo at zonnet.nl
Mon Jan 16 09:18:04 CET 2012
On Jan 15, 2012, at 2:58 PM, dE . wrote:
> On 01/15/12 20:18, Henk D. Schoneveld wrote:
>> On Jan 15, 2012, at 8:08 AM, dE . wrote:
>>> If I specify a high bitrate in order to ensure lossless quality, the bitrate becomes really high even for videos at horrible quality. The results --> original is larger than encoded.
>> Rubbish in rubbish out. If the source has a lot of noise for example, that is very expensive, bitwise, to compress therefore the larger size. Lossless encoding is much more efficient, bitwise, when the source is clean/highquality. At least I think so.
> But howcome mpeg4 churns 1/3rd the bitrate under same settings? -b:v is 20000k in both cases, with mpeg4 I get 3 - 4k and with libx264 I get 11000 to 20000.
libx264 seems to obay your commandline, while mpeg4 seems to ignore it.
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