I am running FFMPEG on a Windows 10 (64-bit) laptop with Intel i3 (6th generation) processor and AMD R5 M430 GPU.
I shot many videos on a recent trip. Cumulatively, they are over 100 hours long. Each video occupies 2-3 GB minimum and is at least 1 hour long.
I need to trim 2-4 videos and then concatenate them into one single file. This operation needs to be performed for all these videos.
Right now, I am trimming individual videos using the following command:
ffmpeg.exe -i "INPUT_VIDEO" -ss START_TIME -to END_TIME -c copy "OUTPUT_VIDEO"
And then I concatenate the videos using this command:
ffmpeg.exe -f concat -safe 0 -i VideosToBeConcatenated.txt -c copy "CONCATENATED_OUTPUT_VIDEO"
VideosToBeConcatenated.txt contains the file names of the videos to be concatenated.
Running these commands in a single Command Window gives me a speed of 20-25x. Running them in two Command Windows simultaneously drops the speed to 10-12x, while also making my system lag/freeze.
Is there a way I could use my GPU to speed up these operation? Say, using the i3's Quicksync or R5's AMF/VCE?
I tried using
-hwaccel dxva2 in the above mentioned commands as follows:
ffmpeg.exe -hwaccel dxva2 -i "INPUT_VIDEO" -ss START_TIME -to END_TIME -c copy "OUTPUT_VIDEO"
ffmpeg.exe -hwaccel dxva2 -f concat -safe 0 -i VideosToBeConcatenated.txt -c copy "CONCATENATED_OUTPUT_VIDEO"
However, I don't notice any increase in speed.
I also set
cmd.exe to "High Performance" in the AMD Switchable Graphics settings. But the in-built Switchable Graphics Monitor suggests that neither of the processes are using the dGPU.
Is there a way I could use my GPUs (i3's Quicksync or R5's AMF/VCE) to speed up these operation without compromising the quality of the output videos?
[Edit:] I am trying to make sense of FFMPEG's Quicksync documentation but it's too mature for an amateur like me.