[mythtv-users] lossless cut issues with ceton infinitv

[Krys Allen]

Well this whole commercial removal is proving to be a lot more difficult
than i could have imagined...

 i removed a splitter and changed my a cable amp and got my signal level up
to ~6db on average, tried two new recordings and lossless cut failed on
both with an error during the mkvmerge

"Error: Found B frame without second reference in a non closed GOP. Fix the
MPEG2 video stream before attempting to multiplex it."

Not sure whats up with that.

Back to trying Avidemux, I found that adjusting the audio sync worked great
and went to make my first commercial free video with avidemux2_cli. I
immediately ran into an issue where i set the first segment to frames
60-23307, when I run the command it tells me that frame 23307 is a "b"
frame and it wont let me end on that frame. Whats weird is that with the
avidemux GUI i can select that frame and it tells me it is an "I" frame. I
never would have thought that with all our technological advancements there
isn't an easier way to chop pieces out of a file... lol. I guess I will
give up for now.

-Krys


On Sun, Feb 24, 2013 at 1:16 PM, Doug Vaughan <r.d.vaughan at rogers.com>wrote:

> 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<http://www.mythtv.org/wiki/User:Iamlindoro>
>
> I hope this answers your questions.
>
>
> Doug
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