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Limiting threads for both FFmpeg and OpenMP (attempting to find a good balance of parallel performance, while not spawning too many threads). Sometimes more is not always better.

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Jonathan Thomas
2018-09-11 10:48:30 -05:00
parent e879188a7d
commit 6b37ad7e1d
3 changed files with 8 additions and 6 deletions
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4
src/FFmpegReader.cpp
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@@ -153,7 +153,7 @@ void FFmpegReader::Open()
pCodecCtx = AV_GET_CODEC_CONTEXT(pStream, pCodec);
// Set number of threads equal to number of processors (not to exceed 16)
pCodecCtx->thread_count = min(OPEN_MP_NUM_PROCESSORS, 16);
pCodecCtx->thread_count = min(FF_NUM_PROCESSORS, 16);
if (pCodec == NULL) {
throw InvalidCodec("A valid video codec could not be found for this file.", path);
@@ -191,7 +191,7 @@ void FFmpegReader::Open()
aCodecCtx = AV_GET_CODEC_CONTEXT(aStream, aCodec);
// Set number of threads equal to number of processors (not to exceed 16)
aCodecCtx->thread_count = min(OPEN_MP_NUM_PROCESSORS, 16);
aCodecCtx->thread_count = min(FF_NUM_PROCESSORS, 16);
if (aCodec == NULL) {
throw InvalidCodec("A valid audio codec could not be found for this file.", path);