ZProcess: srt using FFmpeg?

[agerdin]

Zehd, is there any way I can get subtitle files (srt, sub) transcoded using FFmpeg?. The internal srt viewer in GBPVR works but is totally out of synk irregardless how much I am trying to tweek <SubtitleDelayMVP> in the config.xml.

Subtitles works fine using Mencoder but I am not happy with the quality and that it using to much resourses.

Thanks,

\\Agerdin

[HtV]

I had to put a negative subtitle delay in the config.xml.

Code:

<SubtitleDelay>-7000</SubtitleDelay>

something like that.

[pastro]

does it slide with respect to the program or is it a fixed time that it is off?

[HtV]

I haven't used it for a long time, but it seemed to work quite well (in my memory ). Try it out.
As i remember it was about 7 or 8 secs off, seems like the subs start playing right away while the movie still has to be transcoded. (the mvp transcode delay)

[agerdin]

I had to put a negative subtitle delay in the config.xml.

Code:

<SubtitleDelay>-7000</SubtitleDelay>

something like that.

Htv, I am confused. Will this not affect the subtitle delay when using GBPVR through the PC? I am trying to change <SubtitleDelayMVP> for my MVP but I can not see any change irregardless of what number I choose in the config.

\\Agerdin

[pastro]

I wrote a subtitile delay program that slides the caption timing with respect to the video. I could add a fixed delay parameter that would allow you to adjust your caption file. But that would add the delay time to the file and it wouldn't work on the PC correctly without readjusting the timing. Your call, if you want the change let me know.

[zehd]

Zehd, is there any way I can get subtitle files (srt, sub) transcoded using FFmpeg?. The internal srt viewer in GBPVR works but is totally out of synk irregardless how much I am trying to tweek <SubtitleDelayMVP> in the config.xml.

Subtitles works fine using Mencoder but I am not happy with the quality and that it using to much resourses.

Thanks,

\\Agerdin

Sorry. Late to the party. The forums are really messed up.

Personally, I'm a little confused myself. I'm to understand that FFmpeg will not do SRT files, and yet there is the setting in the config.xml for <SubtitleDelayMVP> which indicates sub introduced this switch to work with the default ffmpeg transcoder. I can see of no way to get ffmpeg to use SRTs.

If you want to set a delay using MEncoder, I could add that into ZProcess.

Why are you having trouble with MEncoder? What's wrong with the quality? I find that the default settings I use in ZProcess display the same quality for either ffmpeg or mencoder, but mencoder has better options control...

Do you mean the quality of the subtitle?

[agerdin]

Sorry. Late to the party. The forums are really messed up.

Personally, I'm a little confused myself. I'm to understand that FFmpeg will not do SRT files, and yet there is the setting in the config.xml for <SubtitleDelayMVP> which indicates sub introduced this switch to work with the default ffmpeg transcoder. I can see of no way to get ffmpeg to use SRTs.

Zehd, I do get subtitles using FFmpeg, but they are not transcoded into the avi. Hence, I believe that the internal GBPVR srt viewer is used (no idea how, since the filename is different when transcoded). But since I have a delay in the transcoding the subtitles are off. I thought that the tag <SubtitleDelayMVP> was the remedy but there is no change when I alter the value. I have tried both positive and negative values. Maybe this is something for Sub?

If you want to set a delay using MEncoder, I could add that into ZProcess.

No need for that. Using MEncoder the subtitle is actually transcoded into the avi and its in sync.

Why are you having trouble with MEncoder? What's wrong with the quality? I find that the default settings I use in ZProcess display the same quality for either ffmpeg or mencoder, but mencoder has better options control...

I need to do more tests but my main problem is that MEncoder is too slow. I had to put the delay to 10 sek, but thats not enough if other things (processes) are running on the computer. With FFMpeg I can continue use the computer for other things. Other problem is that the picture is very very dark, and the brightness setting is not saved into the profile. The slide bar for brightness is not working either so I had to manually set the value to increase brighness. Last but not least, I find the overall quality of the picture better with FFMpeg. Maybe I am doing something wrong here.

Do you mean the quality of the subtitle?

No, quality of the film (see above)

\\Agerdin

[agerdin]

I wrote a subtitile delay program that slides the caption timing with respect to the video. I could add a fixed delay parameter that would allow you to adjust your caption file. But that would add the delay time to the file and it wouldn't work on the PC correctly without readjusting the timing. Your call, if you want the change let me know.

Pastro, Thanks for the offer but I think I pass. The reason is that I need to have it working for both MVP and PC without having to change every time.

\\Agerdin

[zehd]

Zehd, I do get subtitles using FFmpeg, but they are not transcoded into the avi.

Hmmm. I will look into that. Maybe I can implement it with FFmpeg too...

MEncoder should perform quicker than ffmpeg. Period. BTW when you say FFmpeg do you mean ZProcess with ffmpeg or the defaults without ZProcess?

I have recognized a problem with saving settings in ZProcess config. I thought I posted the update. I'll check...

Yep, it's not saving settings. Sorry. I'll have a patch out in a few hours.

BTW if you are successful using ffmpeg without ZProcess, then you could try Zprocess with 'below normal' CPU priority which is the same as how GB-PVR spawns ffmpeg natively, by default