mp3s when played in Shotcut for some reason skip the first few seconds of the track. Sometimes this happens when previewing the track while it’s in the playlist but it has always happened to me when I bring the track down to the timeline.
To recreate this:
1 - Import first a video file and bring it to the timeline.
2 - Click the speaker icon at the track’s head to mute the video track.
3 - Import any mp3 audio that has audio kick in right at the start of the mp3.
4 - Create an audio track under the video track in the timeline and bring that mp3 track to that audio track.
5 - Play the first several seconds of the timeline with the video muted and the mp3’s sound on from the very beginning.
6 - After several seconds, pause it then click the rewind icon to bring back the playhead to the start.
7 - Play it again.
The first several seconds of the mp3 should be cut off with it playing several seconds ahead. From that point on you can’t play the first several seconds of the mp3 anymore. This happened to me before the final October build but I forgot about it until now. I recreated this several times already. This does not happen if you are making an audio track out of a video file in the playlist. That means that the current workaround I have until this is addressed is to take a mp3 file I am working with and throw it into a mkv container along with some video and import that into Shotcut.
I will also bring up here that at times I have seen that when I import an audio track to the timeline it will be placed a frame ahead of the very start even if the playhead is placed right at the start. This doesn’t always happen and I don’t know what exactly causes this but I will note that here in case that can also be addressed. I do know that when this occurs the playhead from that moment on behaves as if there is some track starting one frame ahead of the beginning of the timeline. Therefore if I click to rewind the playhead to the start it will stop just short of the very beginning as if there there was a track placed there. I have to click rewind one more time then to bring the playhead to the very beginning.