[mythtv-users] Ad removal and lossless transcode for mpeg2 recordings

[Mark Perkins]

> On 17 Oct 2013, at 11:09 pm, "Raymond Wagner" <raymond at wagnerrp.com> wrote:
> 
>> On 10/17/2013 7:37 AM, John Pilkington wrote:
>> Now we record digital streams assembled at source, and most edit points, particularly those at programme start, end, and ad-breaks, occur at keyframes.
> 
> That has not been my experience.  At least my local stations tend to re-encode their video before transmission, and do not do any dynamic GOP restructuring to align with scene transitions.  This is particularly visible when they do their evening news teasers at the end of a commercial break.
> _______________________________________________
[Mark] I'm afraid I am the same as Raymond. I put all my archive recordings through Handbrake so can't use mythtranscode so am trying to make all my cuts on key frames. It's not too bad but probably only 1 in 4 cut points when aligned to key frames would actually also be in the blank frames of the transition too/from program material. I need to either leave a small amount of commercial in or lose a few frames of program. (I use John's mythDVBcut with ProjectX making the cuts).