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Fix T74443: No render in VP9 lossless mode 

We define Lossless as CRF 0 (which is usually the best quality and is
working fine with other codecs afaict), but since WebM only allows for
CRF values between 2-32 and actually has a dedicated "lossless" mode, I
suggest using that (it produces large files though, so double-checking
would be welcome).

https://trac.ffmpeg.org/wiki/Encode/VP9#LosslessVP9

Maniphest Tasks: T74443

Differential Revision: https://developer.blender.org/D7800
This commit is contained in:
Philipp Oeser 2020-05-20 14:08:48 +02:00
parent a76e804309
commit 98689f51c0
Notes: blender-bot 2023-02-14 05:22:18 +01:00 
Referenced by issue #74443, No render in VP9 lossless mode
1 changed files with 4 additions and 1 deletions
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5
source/blender/blenkernel/intern/writeffmpeg.c
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@ -606,7 +606,10 @@ static AVStream *alloc_video_stream(FFMpegContext *context,
c->gop_size = context->ffmpeg_gop_size;
c->max_b_frames = context->ffmpeg_max_b_frames;
if (context->ffmpeg_crf >= 0) {
if (context->ffmpeg_type == FFMPEG_WEBM && context->ffmpeg_crf == 0) {
ffmpeg_dict_set_int(&opts, "lossless", 1);
}
else if (context->ffmpeg_crf >= 0) {
ffmpeg_dict_set_int(&opts, "crf", context->ffmpeg_crf);
}
else {