Opened 18 years ago
Closed 18 years ago
#4340 closed defect (invalid)
Bad preview pixmaps for AVI files
| Reported by: | Owned by: | Isaac Richards | |
|---|---|---|---|
| Priority: | minor | Milestone: | unknown |
| Component: | mythtv | Version: | head |
| Severity: | low | Keywords: | bad pixmaps, AVI container, XviD, X264 |
| Cc: | Ticket locked: | no |
Description
I recently transcoded some of my recordings to XviD and X.264 in an AVI container. The previews generated by MythWeb (via the UPnP /Myth/GetPreviewImage method) are always garbled. It looks as though the frames that are grabbed are not keyframes, but rather something in between. The result is a bad image. I was sure to rebuild the seektable prior to generating the preview pixmaps.
This only seems to happen for the AVI container. NuppleVideo and MPEG-2 work fine. I have not tested other container formats.
I have attached sample .png files to illustrate the results.
Attachments (2)
Change History (5)
by , 18 years ago
| Attachment: | 1035_20071206200000.avi.png added |
|---|
comment:1 by , 18 years ago
Not sure if this is known and planned to be fixed as part of task #3361.
-- Joe Ripley vitaminjoe@…
comment:2 by , 18 years ago
This also happens for me when transcoding away commercials from recordings. I'm not 100 on this but I think I'm doing a lossless transcode so the video quality is the same. So every ".nuv" file has garbled preview image. I have a feeling this started at rev 15029 or a little before.
Sample image of bad preview pixmap