Sync Issues When Downloading and Merging Live Videos

[Anything1365]

Hello,

When trying to download a live video via 'N_m3u8DL-RE "URL" --save-name "output" --no-log --live-real-time-merge --live-pipe-mux',
it downloads the live video, but the audio and video are out of sync. Generally, when downloading normal videos with defined timestamps, everything is okay. However, this issue only occurs with live videos.

I want to add that when I download a live video without '--live-pipe-mux' and then stream the two files '.mp4' and '.m4a', everything works great. But when I try to merge the files (with ffmpeg or mkvmerge), the merged video lacks audio and video sync (even after the live broadcast).

Thank you.

[Anything1365]

I've identified a solution to the issue. It appears that certain types of live videos experience problems, while others function correctly. For these problematic video types, I've discovered that using the following command resolves the issue:

ffmpeg -readrate 1 -i "INPUT_VIDEO_FILE_NAME.mp4" -ss 1.2 -i "INPUT_AUDIO_FILE_NAME.m4a" -c copy "OUTPUT_VIDEO_FILE_NAME.ts"

This command effectively adjusts synchronization and fixes the audio-video sync problem.

[By removing "--live-pipe-mux" from 'N_m3u8DL-RE "URL" --save-name "output" --no-log --live-real-time-merge --live-pipe-mux' (which runs in the background before executing the ffmpeg command)].