Operating system : Windows 10
Shotcut version : shotcut-win64-210129
So I am using shotcut for one week now and pretty happy with it. Very intuitive and powerful.
I use it for a repetitive task : add audio track to soundless videos.
Puzzling thing : The source video cannot be responsible for the hiss as it is soundless and audio tracks are shifted to play a couple of seconds after the video starts so they cannot be responsible for the hisses either.
- create project
- insert and populate 1 track for short video without audio
- insert and populate tracks for 4 different audio (soprano, alto, tenor, bass)
- mute all audio tracks except soprano. Export soprano video
- mute all audio tracks except alto. Export alto video
- mute all audio tracks except tenor. Export alto tenor
- mute all audio tracks except bass. Export alto bass
On some of these produced videos I have a high pitch crack/hiss noise at start up. Exactly what is described by Rick1 in October 2019 under title "Crackling at start of audio in exported video"
As this bug was marked fixed and closed, I downloaded version v19.12.16 and tried it.
And yes, I don’t have that issue anymore.
So version 19.12.16 solves my problem and does exactly what I need but I still thought I would submit a bug report to help Shotcut programmers on their way to make the best free lightweight portable video editor in the world.
Extra information 1 : the crack/hiss is not the same on every produced video. Sometimes it is there, sometimes not. But if it appears on a video, reexporting the project will result in the very same disturbing noise at startup. Removing 1 or 2 ms from the start of the (soundless) video sometimes allow to eliminate the issue. But sometimes not. Also what’s confusing is that the noise is not played by VLC. But when I upload the video to Archive[.]org then I can hear the noise. During my investigations, I found that Avidemux plays the hiss and also an online tool like video-cutter can play it. It is even better to use audio-cutter since you can also see the artefact.
Extra information 2 : I prepared a self-contained testcase with a .mlt file and corresponding video + audio files but when it came to uploading it, the 8Mb zip file was refused for being too large. I keep it on my computer for you if you need it one day.