I use ffmpeg command directly to decode hevc file to yuv. There is also a thread taking a whole cpu core until the decode process end.
2017-07-10 10:39 GMT+08:00 张晶 <[email protected]>: > Hi all, > > I'm trying to use h264_cuvid and hevc_cuvid decoders. > > There is a cuda thread taking a whole cpu core, like some kind of busy > waiting. The stack looks like: > > Thread 1 (process 9104): > #0 0x00007f6697702e60 in ?? () from /usr/lib64/libcuda.so.1 > #1 0x00007f66976f639d in ?? () from /usr/lib64/libcuda.so.1 > #2 0x00007f66977038a8 in ?? () from /usr/lib64/libcuda.so.1 > #3 0x00007f672a63583d in start_thread () from /lib64/libpthread.so.0 > #4 0x00007f6729a00fcd in clone () from /lib64/libc.so.6 > > If I create multiple decoders in a proccess, only one cuda thread occupy a > single cpu core. > > If I create a decoder in one proccess, each proccess has a thread taking a > whole cpu core. > > Even when I delete the decoder, this thread remains. Only when I kill the > proccess, this thread quit. > > I have test several versions of ffmpeg: 3.3.1, 3.3.2, git snap shot of > 2017-07-07, > > And test two nvidia cards: quadro k1200, gtx 1060. > > This situation remains the same. > > Is this a problem? Are there some work arounds? > > > Jing Zhang >
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