[FFmpeg-user] 4K 60Hz Directshow Video Capture
alex.p at avenview.com
Mon Feb 12 17:37:44 EET 2018
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.
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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