[FFmpeg-devel] Some questions about ffmpeg h264_qsv decoder
ivan.uskov at nablet.com
Wed Sep 16 21:21:08 CEST 2015
Wednesday, September 16, 2015, 9:00:02 AM, you wrote:
R> a) qsv decode h264 file found many duplicated frames.
I have posted the patch "[PATCH] libavcodec/qsvdec_h2645.c Bug fixed: wrong
ticks_per_frame." to this list, please try to apply it the issue should be
R> b) A 1920x1080 video transcode to 1280x720, both CPU and GPU used more than 1920x1080 to 1920x1080.
Unfortunately the current implementation of qsv modules of ffmpeg does use
own standalone MXF session. So there are copying from GPU memory to system
memory and back are existing during transcoding. Also here software scaler
uses when you transcode 1920x1080 ==> 1280x720. We a working under
possibility to create complete pipeline into GPU: [qsv_dec]==>[qsv_vpp(scaler)]==>[qsv_enc]
But I can not say currently when exactly it will available.
Ivan mailto:ivan.uskov at nablet.com
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