Update README.md

README.md

@@ -156,6 +156,7 @@ Unsupported files can still be converted to a supported format/codec from the `F
 - **Cutting times are not accurate!** Start cut time will be "rounded" to the nearest **previous** keyframe. This means that you often have **move the start cut time to few frames after** the desired keyframe.
   - Lossless cutting is not an exact science. For some files, it just works. For others, you may need to trial and error depending on the codec, keyframes etc to get the best cut. See [#330](https://github.com/mifi/lossless-cut/issues/330)
   - Your mileage may vary when it comes to `Keyframe cut` vs `Normal cut`. You may need to try both, depending on the video. [ffmpeg](https://trac.ffmpeg.org/wiki/Seeking) also has documentation about these two seek/cut modes. `Keyframe cut` means `-ss` *before* `-i` and `Normal cut` means `-ss` *after* `-i`.
+  - If you're seeing a blank video at the beginning of the resulting file, try `Keyframe cut` instead.
   - You may try to enable the new "Smart cut" mode. However it is very experimental and may not work for most files.
 - When exporting you may lose some proprietary data tracks (like `tmcd`, `fdsc` and `gpmd` added by GoPro). These can however be losslessly exported to separate files.
 - If you cut a file, but the duration of the exported file is incorrect (or the same as input), try to disable all tracks except for the video track.