[FFmpeg-user] Encoding 4K 60Hz lossless from a capture card

[Roger Pack]

You are still performing encoding:

"(native) -> (h264)"

On 12/12/17, Alex Pizzi <alex.p at avenview.com> wrote:
> Windows 10 64-bit
> Ryzen 7
> GTX 1080
> 32GB RAM
>
> Hi all,
>
> I'm trying to encode 4K 30/60Hz video in a lossless format from a 4K
> capture card and everything I've tried gives me a similar error as in the
> linked image, [real-time buffer too full or near too full frame dropped]
>
> https://cloud.githubusercontent.com/assets/4932401/22171307/ef5c9864-df58-11e6-8821-4b74ce3f32d0.png
>
> This is the command I've tried most recently:
>
> ffmpeg.exe -f dshow -video_size 3840x2160 -framerate 30 -pixel_format bgr24
> -rtbufsize INT_MAX -i video="MZ0380 PCI, Analog 01 Capture" -vf fps=30
> out%d.BMP
>
> With the images dumped to a 10G RAM disk or 850 EVO. I'm doing this to skip
> the encoding step.
>
> I get the same error when encoding with h265 lossless and NVENC h265
> lossless.
>
> I need the video to be lossless as it will be used to test hardware h265
> encoders.
>
> Video source is a 4K Blu-ray.
>
> Any help would be greatly appreciated. Thank you.
>
> -Alex P
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".