[FFmpeg-trac] #7112(avcodec:new): FFmpeg should support hwaccel to handle device lost issue
FFmpeg
trac at avcodec.org
Fri Mar 30 10:07:03 EEST 2018
#7112: FFmpeg should support hwaccel to handle device lost issue
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Reporter: haviet | Type:
Status: new | enhancement
Component: avcodec | Priority: normal
Keywords: device lost | Version: 3.4
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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I often face "device lost" problem when use hardware-based decoders and I
believe others using hardware-based encoders/filters face the same
problem.
For example, when the device lost, h264_nvdec (CUDA) decoder would give
errors like this:
[h264 @ AVCodecContext] Error decoding a picture with NVDEC: 700
[h264 @ AVCodecContext] hardware accelerator failed to decode picture
There are many reasons may cause GPU device lost during its working such
as
- The graphics driver is upgraded.
- The system changes from a power-saving graphics adapter to a
performance graphics adapter.
- The graphics device stops responding and is reset.
- User manually disable or enable device.
- A graphics adapter is physically attached or removed.
- Remote access to the PC which could change display resolution.
- Unplugging or plugging the monitor cable to the VGA adapter.
- Etc.
Of course, not all reasons cause "device lost" always, some may happen to
some kind of PCs but may not happen to others.
I would FFmpeg to provide a callback mechanism giving the API user a
chance to reset or recreate
the hardware acceleration resources, or even switch to software
decoder/encoder/filter if the device
can not be recovered.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7112>
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