Exported File Black Screen

[bikescenes]

Hi,
Trying to export my first project using hardware encoder. After ticking this option it autodetects h264_qsv as available. However, when I open the exported file its just a black screen but with audio.

I have a Sony Vaio Z Laptop with Intel Core i5-3210M CPU 2.5GHZ, 4GB ram and Intel HD 4000 integrated GPU.

If I turn off hardware encoding the file exports fine but obviously takes a lot longer.

Any help appreciated.

[shotcut]

Right-click a completed export job with hardware encoder turned on, and view the log. Look for some interesting message. Maybe it is a resolution problem or something it does like with a codec parameter. If you are uncertain, save the log and upload it here and do the same with View XML so we can see your project and encoding details.

[bikescenes]

I believe its because it was shot in 2k Superview mode which is a resolution of 2704 x 1520. When I change the export resolution to 1920 x 1080 the hardware encoding works. Could you recommend a resolution I could try which would keep more of the quality of the original?.

[Elusien]

@bikescenes

Could you recommend a resolution I could try which would keep more of the quality of the original?.

Software encoding in general gives better quality. See here:

No Video when using hardware encoder

Correct. In general CPU encoding is focused on quality whereas GPU encoding is focused on speed - if you can accept lower quality or higher final bitrate then GPU encoding is for you as it will be faster, if your goal is highest possible quality at lowest possible bitrate then CPU based encoding will be your best option at the cost of increased encoding time.

[bikescenes]

Thanks for this, I wasn’t aware of the differences between CPU and GPU rendering. I have quite a slow laptop and will perhaps have to look at one of the Proxy tutorials on the forum and probably set rendering off overnight using CPU.

[KKnBB]

Make sure you take a look at the export file size. A Blank video with sound normally only few megabytes in size.
If you get a huge size blank video, please double check your media player.