Ffmpeg subtitle hard decoding, how qsv convert

weijian liang

It is known that cpu decoding utilization is very high, because of the player problem, the source has subtitle selection.

Ffmpeg

Ffmpeg4.1 -re -i 1.ts -vcodec libx264 -filter_complex "[0:0][0:4]overlay" -preset fast -deinterlace -s 720x576 -b:v 4000k -r 25 -g 25 -x264opts " Cabac=1: ref=3:me=hex:subme=1" -map 0:a:0 -f mpegts 4.ts

Now I want to use gpu qsv encoding, how to convert the code?

Saen Acro

ffmpeg.exe -hide_banner -i inputFile.ts -c copy -f mpegts -| ffmpeg.exe -hide_banner -hwaccel qsv -c:v mpeg2_qsv -f mpegts -i pipe: -load_plugin 2 -init_hw_device dxva2=gra -init_hw_device qsv@gra -c:v hevc_qsv -preset slow -b:v 1500k -c:a copy "outputFile.ts"

try this
https://pypi.org/project/pytranscoder-ffmpeg/ https://github.com/mlsmithjr/transcoder

weijian liang

Thank you for your answer, but if you put it in tvheadend, how do you call ffmpeg encoding?

Saen Acro

Post processing on recorded content.