[FFmpeg-user] 4K 60Hz Directshow Video Capture

[Alex P]

Windows 10

Intel i7-8700K

GTX 1050Ti

16GB DDR4

SATA Samsung Evo

 

I'm using a Yuan 4K60 capture card with the end goal of capturing the video
in a lossless format. I need it to be lossless as the clips will be used to
test hardware h264 encoders. 

 

Product page:
http://www.yuan.com.tw/products/capture/4k/sc560n1_lv_hdmi2.htm

Directshow is supported.

 

Command: ffmpeg -f dshow -video_size 3840x2160 -framerate 59.9 -rtbufsize
2100000000 -pixel_format bgr24 -i video="MZ0380 PCI, Analog 01 Capture" -c:v
libx265 -x265-params lossless=1 out1.avi

 

I have also tried writing to null: ffmpeg -f dshow -video_size 3840x2160
-framerate 59.9 -rtbufsize 2100000000 -pixel_format bgr24 -i video="MZ0380
PCI, Analog 01 Capture" -c:v libx265 -x265-params lossless=1 -f null -

 

I get the same error (see attatched) and I have to force quit by pressing
Ctrl-C a bunch. Error also occurs if I write to a RAM disk.

 

[dshow @ 000001dda20ca3a0] real-time buffer [MZ0380 PCI, Analog 01 Capture]
[video input] too full or near too full (63% of size: 2100000000 [rtbufsize
parameter])! frame dropped!

 

Any help would be appreciated. 1080p capture right to rawvideo is perfect. I
would like to use NVENC in lossless mode if anyone has experience with that.

 

 

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