Difference between revisions of "Mythtv:Skipping Commercials"

Revision as of 19:29, 14 August 2008

LinuxMCE's default MythTV integration does not automatically edit out commercials after recording, though MythTV does have this ability. In its default state, MythTV will record a show, and then after it is recorded run it though a process which attempts to Identify commercials. It saves this information, but nothing is done with it. After this step is complete, a job runs which adds the new recoding to LinuxMCE's media database so it will show up in the datagrid on the orbiters.

There are, however, ways to Automate commercial removal, as well as manually remove them from old recordings that you didn't have it set to do automatically for. I recommend learning both, as there is no replacement for Human Intelligence when it comes to marking commercials, though in my experience MythTV does a pretty good job of it most of the time.

Automatic Commercial Removal(AKA Automatic Transcoding)

In MythTV terms, this process is called Automatic Transcoding, and there are a couple of settings that must be enabled for automatic transcoding (commercial removal) to work. Also, if you are recording something very important, I would recommend flagging thos recordings not to use automatic transcoding, and manually flag and transcode them yourself, as the algorithms used to flag commercials aren't always 100% accurate. Here are the steps to take to enable automatic transcoding:

• Go into MythTV setup, and go to Utilities/Setup->Setup->TV Settings->Recording Profiles
• Select your capture card from the list (you can have different automatic transcoding settings for each card!)
• Check the option "Enable auto-transcode after recording"
• Go back to Utilities/Setup->Setup->TV Settings->Recording Profiles
• Select the Transcoding option, then the "Autodetect From MPEG2" profile
• Check the Lossless Transcoding checkbox. (This will only remove flagged commercials, with no loss of quality)

Thats it! Now just be sure to set the Automatic Transcoding option for each recording you want this to happen for. For example, using mythweb, when setting up a show to record, there is a simple checkbox to enable Automatic Transcoding for that recording. I just check it, and MythTV does the rest!

Manual Commercial Removal and Transcoding There is a very good detailed writeup on this here

Just follow those instructions to learn how to manually edit the cutlist(areas tagged for deletion) for any recording. It will also show you how to trigger a manual transcode when you are finished. Also note that since this is lossless, you can go back an manually transcode a recording that was previously automatically transcoded with no loss of quality. You may want to do this if MythTV missed removing some commercials, or to remove the lead-in, etc.