Re: [Deinterlace-discuss] TimeShift update

[Nick K. <ni...@ne...>]

>> You also have to record at 30 FPS doing this, because recording at 
>> full height at 60 FPS isn't possible without dropping data. Recording 
>> full height interlaced means you can go and run video post processing 
>> on it and scale it back up to 60 FPS for your final output.
>
>
> One thing I would really like to see is recording all incoming fields 
> (at 50 or 60 fps). When playing back any filtering and deinterlacing 
> could be done. When you record lossless, this results in recorded 
> video played back with the exact same quality as the live viewing.


At full height all incoming fields are captured, it's just that pairs of 
odd/even fields are saved into a single frame as opposed to two frames 
for each field. The objective that I had in mind for the full height 
mode was to have the final video be as close to the source as possible. 
It's just that you have to go through an extra step to get there.

> I did compile the new code and it looks very promising. The code looks 
> simple  and understandable, very good!
> Recording went much smoother than with the old code, no more disk 
> rattling.
>
> Some problems I noticed:
> - the recorded file can't be played back on my system. I don't know 
> why. When processing the file with virtualdub (direct stream copy with 
> both audio and video) the file can be played back. Maybe there is an 
> error in the header?


This is mentioned in the to do list. Most media players for windows (I'm 
guessing) use the old AVIFile library, which doesn't read OpenDML 
chunks. I didn't add the legacy IDX1 chunk to index the first RIFF chunk 
yet, so some players will refuse to play the file. Opening the files in 
AviSynth or VirtualDub works since they understand the OpenDML stuff.

> - sometimes the recording does not stop when pressing shift+s, the 
> hard disk led does not flicker but is lit constantly, the file grows 
> very fast. The only option is to kill DScaler which resulted in a 
> reboot both times.

Does DScaler freeze after pressing stop?

>
> - The Video Compression window does not save the compressor I have 
> chosen. After choosing Huffyuv and pressing OK and pressing Configure 
> again the Compressor is always No Recompression. When recording the 
> correct codec is used though.

I probably forgot to set something before the dialog appears. Will fix soon.

> I don't understand the difference between No Recompression and Full 
> Frames (Uncompressed).

They mean the same thing actually, but they select different FourCCs. 
That dialog is part of the Platform SDK so I can't remove the extra 
option unfortunately.