[FFmpeg-devel] [PATCH 01/11] avcodec/vvcdec: thread, ensure the parse stage gets the highest priority

[James Almer]

On 7/28/2024 12:17 AM, Nuo Mi wrote:
> The parser stage is not parallelizable.
> We need to schedule it as soon as possible to create later stages, which are more parallelizable
> 
> clips                                       | before | after | delta
> --------------------------------------------|--------|-------|------
> RitualDance_1920x1080_60_10_420_37_RA.266   | 342.7  | 365.3 |  6.59%
> NovosobornayaSquare_1920x1080.bin           | 321.7  | 400   | 24.34%
> Tango2_3840x2160_60_10_420_27_LD.266        |  82.3  |  91.7 | 11.42%
> RitualDance_1920x1080_60_10_420_32_LD.266   | 323.7  | 319.3 | -1.36%
> Chimera_8bit_1080P_1000_frames.vvc          | 364    | 411.3 | 12.99%
> BQTerrace_1920x1080_60_10_420_22_RA.vvc     | 162.7  | 185.7 | 14.14%
> ---
>   libavcodec/vvc/thread.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)

One of the patches from this set introduced use of uninitialized values. 
See 
https://fate.ffmpeg.org/report.cgi?time=20240821174441&slot=x86_64-archlinux-gcc-valgrind