[FFmpeg-user] error with cuda for convert ts to mp4

[Dennis Mungai]

On Mon, 11 Jan 2021, 04:30 Michele Salerno, <mikysal78 at gmail.com> wrote:

> Hi,
>
> i have GPU GTX660Ti on debian buster 64bit, cpu intel core i7.
>
> I have fresh install debian and install latest driver and cuda from
> website nvidia, no repository of debian.
>
> If convert file h264 with cpu it's ok, if use gpu i have error.
>
> The video prova.ts is recorder from decoder sat.
>
> The command used is:
>
> ffmpeg -y -threads 8 -vsync 0 -hwaccel cuda -i prova.ts -r 24 -c:v
> h264_nvenc -filter_complex yadif=parity=tff:deint=all,scale=1920:1080
> -b:v 3M -c:a aac -b:a 192k -ar 48000 prova.mp4
>
> This is output
>
> https://pastebin.com/uW9knqkz
>
> what is the error?
>
> Thanks.
>
> Best regards.
>
> Michele
>
>
> _______________________________________________
>


Michele,

Use this:

ffmpeg -y -threads 1 -hwaccel cuda -i prova.ts -r 24 -c:v
h264_nvenc -filter_complex yadif_cuda,scale_cuda=1920:1080
-b:v 3M -c:a aac -b:a 192k -ar 48000 prova.mp4

Notes:

You're using nvdec hwaccel. Lower thread count for the decoder to 1, and
likewise use filters running on the GPU to prevent the need for hwdownload
filters.

>