On Mon, Feb 12, 2018 at 7:37 AM, Alex P <ale...@avenview.com> wrote: > 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. > > > >
haven't used Windows / Directshow for a few years, but back in the day I would have attempted this using VirtualDub and HuffYUV. I believe that HuffYUV is available for ffmpeg, but can't say that I've ever tried it. -- *William Caulfield *| *ContentBridge Systems* _______________________________________________ ffmpeg-user mailing list firstname.lastname@example.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".