[mythtv-users] Captions with HD-PVR help

[Mike Rice]

I added my scripts to the wiki:
https://www.mythtv.org/wiki/Captions_with_HD-PVR_alternate

These are working nicely with 2 HD-PVRs and 1 PVR-500 using zvbi2raw.

On Sun, Nov 16, 2014 at 10:24 AM, Mike Rice <mikerice1969 at gmail.com> wrote:

> On Tue, Nov 11, 2014 at 8:16 PM, Bob <mythtv at cox.net> wrote:
>
>> On 11/11/2014 06:03 PM, Mike Rice wrote:
>>
>>>
>>> I think I may try to start the vbi recording from a rec started writing
>>> event instead of a rec started event.  That may get me closer to what I
>>> need, and then ccextractor might add my delay better (or I'll use a perl
>>> script).
>>>
>> Let me know how well this works. I have a variable amount of delay in my
>> captions. If I do a single recording the delay is around 30 seconds. If I
>> have back-to-back recordings the delay is almost zero. I usually have to
>> use a script to get the captions within 5 seconds, then I can use the
>> frontend menu to fine tune.
>
>
> Looks like I am having pretty good success now.  Most of my recordings
> seem to be fairly in sync with the captions within a second or so (which
> can be easily adjusted in the frontend).  Here's what I did:
>
> 1. Run the hd-captions-start script when REC_STARTED_WRITING event is
> triggered instead of REC_STARTED.  For me there was a minimum pf 8 second
> delay between those two events.  Maybe more if the system was busy.
>
> 2. Removed all code that tried to determine the recording duration and
> adjust based on it.  Instead I just went with the idea of recorder
> on/captions on and recorder off/captions off.
>
> 3. In hd-captions-start just start recording the captions as soon as
> possible.  I left the code to kill vbi2raw in but it has never fired for me
> according to my logs.  Not sure I follow why that's needed.  I am assuming
> the REC_FINISHED event occurs when the tuner stops recording no matter what
> postroll/end late/early options you use.  If that's true then vbi2raw is
> almost certainly killed before the REC_STARTED_WRITING event occurs for the
> next recording, especially in my case where I have around 8 seconds between
> REC_STARTED and REC_STARTED_WRITING.  I will probably try to remove it to
> improve the timing a bit more.
>
> 4. In hd-captions-finalize (called at REC_FINISHED) I just kill the
> vbi2raw that was started in hd-captions-start then run ccextractor -in=raw
> -delay X and copy the resulting .srt file to the recording directory.  I
> also copy the .raw file to the recording directory along with a script that
> I can easily run to adjust the delay if I find out later it is off.
>
> 5. Created a script to run on REC_DELETED to remove the .srt file, .raw
> file, and script.
>
> Still need clean up my scripts a bit but it looks good.
>
>
>
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