Update README.md

README.md

@@ -59,10 +59,15 @@ Note: The original video files will not be modified. Instead it creates a lossle
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 ## Known issues & limitations
-- **Cutting times are not accurate and will be "rounded" to the nearest keyframe.** In the future I plan on showing keyframes in the timecale, and eventually implement a "smart cut" feature that re-encodes the part before the keyframe. See #126
-- **If you have an error when running the cut:** Try toggling the button `all` (all streams) to `ps` (primary streams). If that doesn't help, try to toggle `kc` *(keyframe cut)* to `nc` *(normal cut)*. See discussion in [#13](https://github.com/mifi/lossless-cut/pull/13). GoPro 6/7 seems to require `nc`. `all` (all streams) seems to cause wrong length in GoPro footage (see [#146](https://github.com/mifi/lossless-cut/issues/146) [#121](https://github.com/mifi/lossless-cut/issues/121))
+- **Cutting times are not accurate and will be "rounded" to the nearest keyframe.** In the future I plan on showing keyframes in the timecale, and eventually implement a "smart cut" feature that re-encodes only the part before the keyframe. See #126
+- Your mileage may vary when it comes to `kc` *(keyframe cut)* vs `nc` *(normal cut)*. You may need to try both, depending on the video. GoPro 6/7 seems to require Normal Cut `nc`. See [#121](https://github.com/mifi/lossless-cut/issues/121). [ffmpeg](https://trac.ffmpeg.org/wiki/Seeking) also has documentation about these two seek/cut modes. `kc` means `-ss` *before* `-i` and `nc` means `-ss` *after* `-i`.
+- `all` *(all streams)* seems to cause wrong length in GoPro footage. Use `ps` instead. See [#146](https://github.com/mifi/lossless-cut/issues/146)
 - H265 is not yet supported natively. You need to convert to friendly codec from the menu, see [#88](https://github.com/mifi/lossless-cut/issues/88)
-- If you get an error when cutting any kind of file under Windows, please check your anti-virus. It might be blocking execution of ffmpeg, see [#18](https://github.com/mifi/lossless-cut/issues/18)
+
+## Troubleshooting
+
+- **If you have an error when running the cut:** Try toggling the button `all` (all streams) to `ps` (primary streams). If that doesn't help, try to toggle `kc` *(keyframe cut)* to `nc` *(normal cut)*. See discussion in [#13](https://github.com/mifi/lossless-cut/pull/13).
+- If you get an error when cutting or opening any kind of file under Windows, please check your anti-virus. It might be blocking execution of ffmpeg, see [#18](https://github.com/mifi/lossless-cut/issues/18)
 
 ## Development building / running