Opened 4 years ago

Last modified 4 years ago

#12525 new Bug Report - General

old nuv / mpeg4 recordings from Plextor no longer play in mythtv

Reported by: mythtv@… Owned by: JYA
Priority: minor Milestone: unknown
Component: MythTV - Video Playback Version: 0.27.4
Severity: low Keywords: nuv plextor playback old mpeg4
Cc: Ticket locked: no

Description

I have some old recordings in my mythtv from 2007 that were recorded with my old Plextor PX-TV402U/NA USB hardware mpeg4 device. (I now use a Hauppauge MPEG2.) These recordings used to play back in Myth no problem. Somewhere 1-5 years back they stopped playing back. Not sure what version caused the change. There's no problem with my new (and old) recording with the Hauppauge card.

Myth will try to play the nuv/mpeg4 recordings but will just put up a non-uniform grey screen that doesn't change, and (strangely) play back the audio ok.

If I find the nuv files directly in my recordings directory, I can play them back no problem with mplayer. The problem is just in myth.

I get myth debug errors like:

[mpeg4 @ 0x7f5c90016020] hmm, seems the headers are not complete, trying to guess time_increment_bits
[mpeg4 @ 0x7f5c90016020] my guess is 14 bits ;)
[mpeg4 @ 0x7f5c90016020] looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag
[mpeg4 @ 0x7f5c90016020] warning: first frame is no keyframe
[mpeg4 @ 0x7f5c90016020] I cbpy damaged at 12 1
[mpeg4 @ 0x7f5c90016020] Error at MB: 43
[mpeg4 @ 0x7f5c90016020] concealing 900 DC, 900 AC, 900 MV errors in P frame
[mpeg4 @ 0x7f5c90016020] hmm, seems the headers are not complete, trying to guess time_increment_bits
[mpeg4 @ 0x7f5c90016020] my guess is 15 bits ;)
[mpeg4 @ 0x7f5c90016020] discarding 99 junk bits at end, next would be 6A9010
[mpeg4 @ 0x7f5c90016020] concealing 900 DC, 900 AC, 900 MV errors in P frame
...

mplayer says: Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family libavcodec version 56.1.100 (external) Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)

file says: 1037_20080816115900.nuv: MythTV NuppelVideo? v0.07 (640x480),progressive,aspect:1.33,fps:29.97

It would be nice to be able to watch the files in myth so I can weed through them (and possibly edit/transcode some).

Change History (2)

comment:1 Changed 4 years ago by JYA

can you provide a sample?

comment:2 Changed 4 years ago by mythtv@…

Hmm, all I have in the format is copyrighted tv shows, and the smallest one is 1.1G. Any ideas? I suppose it would be ok to provide it to just one person directly. Would a truncated copy of the file be useful too? That would probably solve both problems. In any case, I can set up a URL for you and email you privately how to get it.

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