Opened 17 years ago
Closed 17 years ago
#2707 closed defect (invalid)
ffmpeg, mytharchivehelper report wrong fps for some .nuv files
| Reported by: | Owned by: | paulh | |
|---|---|---|---|
| Priority: | minor | Milestone: | unknown |
| Component: | mythtv | Version: | 0.20 |
| Severity: | medium | Keywords: | |
| Cc: | Ticket locked: | no |
Description
Mytharchivehelper incorrectly reports some of my transcoded .nuv files as having a fps of 29.9167 when it is actually 29.97 by NTSC standard. This error results in audio sync issues when exporting the video with Mytharchive. I can fix the audio sync by hacking the mythburn.py script to always return a fps of 29.97, which pinpoints the incorrect fps as the cause.
Through some digging I found that mytharchivehelper gets its fps value from libavformat/utils.c, so the problem appears to be with ffmpeg. I don't know enough about the code to be sure, but perhaps ffmpeg revision 6544 fixes the problem?
I can supply a .nuv file affected by this (not all of them are) for testing if needed. Attached is the output of mytharchivehelper for an offending .nuv.
xml output of mytharchivehelper