[mythtv-users] lossless cut issues with ceton infinitv

[Doug Vaughan]

Krys,
     I never found that Avidemux v2.5x could handle HDPVR 1080i 
recordings. Iregularly compile the Avidemux beta version v2.6 or 
sometimes called v3.0 (e.g. just last week). That version does very well 
with HDPVR 1080i recordings. Its downside is that the GUI is not always 
functional(e.g. the mouse scroll wheel always goes backward on the time 
line). It sometimes can edit a recording with defects that other tools 
including the olderAvidemux and mkvmerge cannot handle. I basically keep 
it in my bad of tricks.

As for Avidemux CLI, the idea was to have a script like Lossless Cut 
generate an Avidemux "js" or "tinyPY"project file from MythTV cut 
listinformation then use Avidemux CLI to perform the cut and merge 
processing in lue of mkvmerge. Without the automatic generation of the 
Avidemux project file you may as well perform manual edits in the GUI 
and let it do theprocessingthrough a save.

     As far as audio sync is concerned the Avidemux v2.5x had a 
consistent audio delay of 340 milliseconds with my HDPVR recordings 
which I corrected by washing the lossless edited video through mkvmerge 
CLI with a video sync delay value of340 milliseconds. With Avidemux v3.0 
there no audio sync issues in the saved lossless cut videos. It should 
be noted that ffmpegcan be used to change the track sync as an 
alternative to mkvmerge.

There is, on the MythTV wiki, an unsupport Avidemux project file 
generator bash script but it will not work with beta Avidemux v3.0as the 
project scripts have difference syntaxthan Avidemux v2.5x. In fact I was 
trying to update that script before venturing into Lossless 
Cutdevelopment. The original developer of the script has left the project.
See: http://www.mythtv.org/wiki/User:Iamlindoro

I hope this answers your questions.

Doug