On 12/15/05, ffrr <[EMAIL PROTECTED]> wrote: > Cymen Vig wrote: > > >I have been experimenting with transcoding the MPEG-2 output of my > >Hauppauge PVR-500 device to MPEG-4. The current settings are are below ... > > > >I've also noticed that attempting to play the MPEG-4 files with > >mplayer results in the wrong aspect ratio as it thinks the video is > >720x480 while it really appears to be 480x480. If I jump around in the ... > > I convert to small mpeg4 files for viewing on a Palm Tx. I have limited > my minimum quality to 10. It is much better, but not perfect. I think > you should limit your minimum quality, and maybe reduce the bitrate to > keep the size down at the same time. The overall result might be better.
After the advice in the thread and some guessing I switched to this: Transcoders->Autodetect from MPEG2: Profile name: MPEG2 Reize video while transcoding: unchecked Width: 720 Height: 480 Video compression: Codec: MPEG-4 Bitrate: 2400 Maximum quality: 1 Minimum quality: 6 Max quality difference between frames: 2 Scale bitrate for frame size: checked Enable high-quality encoding: checked Enable 4MV encoding: checked Enable interlaced DCT encoding: checked Enable interlaced motion estimation: checked Audio compression: Codec: MP3 Sampling rate: 32000 MP3 quality: 5 Volume (%): 90 The picture quality is much better but transcoding time is long -- 26 minutes for a 30 minute MPEG-2 file with jobs set to medium priority. I don't know if the interlaced options apply to MPEG-2 data coming out of a Hauppauge card. With the resolution changes (see below) the file sizes are 1.1 GB for MPEG-2 and 650 MB for MPEG-4. I did get one step closer to the aspect ratio issue -- I found ivtvctl -a on -d /dev/video0 and /dev/video1 (Hauppauge PVR-500 card with dual tuners) thought the it should be 480x480 which is what MythTV was initially set to also. But the MPEG-2 files seemed to really be 640x480. After reading a few pointers on the list I switched my settings to 720x480 with: 1) edit startup scripts: /usr/local/bin/ivtvctl -d /dev/video0 -f width=720,height=480 -c dnr_temporal=0 >> /dev/null /usr/local/bin/ivtvctl -d /dev/video1 -f width=720,height=480 -c dnr_temporal=0 >> /dev/null 2) change settings in MythTV to 720x480 and type of DVD Special 2 for stream (apparently works with this resolution for playing the MPEG-2 back on DVD player) 3) change transcode settings to 720x480 _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
