ffmpeg -i input.mp3 -af volume0.5 output. For example, the following command will decrease volume by half. I think that with the latest drivers, ffmpeg and Cuda you can get good results. I will attach an elementary stream for which FFmpeg decodes five frames before the first I-frame ffmpeg -vsync 0 -i h264fail.h264 -vframes 10 out2d.png ffmpeg. For example to compute the CRC of the input audio converted to PCM unsigned 8-bit and the input video converted to MPEG-2 video, use the command: ffmpeg -i INPUT -c:a pcmu8 -c:v mpeg2video -f crc -. I use the gpu for downscaling and upscaling, to apply filters, and HDR In some cases the ffmpeg uses the CPU together with the gpu, the fps drops from 120 to about 15. Hi I am trying to change reference frames from 4 to 3 but it didn't work. You can select the output format of each frame with ffmpeg by specifying the audio and video codec and format. ffmpeg -i source.mpg -vcodec h264nvenc -flags +ildct+ilme -acodec copy -f mpegts out.mpg.
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