[mythtv] Accuracy of external subtitles

Taylor Ralph taylor.ralph at gmail.com
Wed Mar 10 04:23:55 UTC 2010

On Tue, Mar 9, 2010 at 11:22 PM, Taylor Ralph <taylor.ralph at gmail.com> wrote:
> On Tue, Mar 9, 2010 at 6:21 PM, Jim Stichnoth <stichnot at gmail.com> wrote:
>> On Tue, Mar 9, 2010 at 1:53 PM, Michael T. Dean <mtdean at thirdcontact.com> wrote:
>>> On 03/09/2010 02:24 AM, Jim Stichnoth wrote:
>>>> Any thoughts/comments on this?
>>> Related/similar to http://svn.mythtv.org/trac/ticket/7515 ?
>> I was wondering the same after seeing Taylor Ralph's update of #7515
>> this morning.  I just got a chance to try out the essence of the patch
>> (i.e., using timecode instead of frameNumber), and so far it's working
>> perfectly, the subtitles are completely in sync.
>> Jim
> Using the timecode is definitely the right solution. The code
> currently using frame numbers and rates is essentially flawed since
> not only can the rate change but you can also have repeated frames
> which aren't accounted for in the calculations. The only modification
> needed to the timecode patch is to account for the start time and wrap
> bits which are both available via AVContext and AVStream. A simple
> function can be added to avformatdecoder.cpp to handle this. Once
> that's completed and tested it can be committed.

FYI, the sooner I get a sample with a corresponding .srt the sooner
this will get fixed. ;)


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