Dne 30.12.2016 v 05:48 Ali KIZIL napsal(a):
2016-12-30 0:02 GMT+03:00 Miroslav Slugeň <thunde...@email.cz>:
Somebody changed AUD to active in NVENC by default, which is not very
clever, libx264 also has this future disabled, so we should stay in sync
with libx264 behavior.
Enabled AUD will work only without B-frames. There is BUG in Nvidia NVENC
when you use AUD for H264 with B-frames, it will return corrupted stream,
because NVIDIA is inserting AUD type 0 (I-frame) before B-frames instead of
AUD type 7 (any-frame).
H264 encoded with B-frames and AUD active will not play for example on
Panasonic TX-AS640E, other decoders just ignore wrong AUD type.
--
Miroslav Slugeň
AUD set to active by default was for LG and Sony like UHD TVs which could
not decode NVENC encoded HEVC MPEGTS properly.
If patch sets AUD active by default if there is no B-Frames (as so in NVENC
HEVC encoding), patch will be ok in common.
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I checked how libx264 and libx265 works
For libx265 default is off:
void x265_param_default(x265_param* param) {
param->bEnableAccessUnitDelimiters = 0;
}
Only for UHD BLURAY is on:
if (p->uhdBluray) {
p->bEnableAccessUnitDelimiters = 1;
}
For libx264 default is off:
void x264_param_default( x264_param_t *param ) {
param->b_aud = 0;
}
Only for BLURAY and AVC-Intra compat
if( h->param.b_bluray_compat ) {
h->param.b_aud = 1;
}
/* 200,100,50 */
if( h->param.i_avcintra_class ) {
h->param.b_aud = 1;
}
So how we should implement this to NVENC? :)
I still think we should default AUD to off and set in on only in special
cases like BLURAY and AVC-Intra.
--
Miroslav Slugeň
+420 724 825 885
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