Trouble converting 25FPS MKV file to 24FPS

[dave in or]

Help Needed!

I have an h264 MKV file that plays at 25 fps that I want to be able to play on my blu ray player. The video quality is fine on my computer (except my computer is too slow and plays it choppy). I can play this file on the blu ray player but the video is "blocky" on any moving parts of the screen - stationary stuff looks great. I thought this would be a simple task of seperating the audio & video tracks, adjusting fps, and merging it back into an MKV file. All of the tutorials are short and simple. Every adjustment I have made gets the same result as the original file - blocky motion.

Here is what I have tried. MKVcleaver is the only thing I could get to split the tracks - for some reason MKVextractGUI and wizard didn't work. I successfully adjusted the audio with eac3to. After that I used MKVmergeGUI and adjusted the FPS to 24000/1001. The resulting file appeared the same as the original with distorted video - and it wouldn't play at 24HZ. So used tsmuxer on the extracted h264 video and used the change fps setting. I used MKVmerge with this new video and the adjusted ac3 track. The resulting file would now play at 24HZ but still the video quality is still distorted - this makes me wonder if MKVmerge can actually change frame rate as I have read or if the option is only to inform the program what the actual frame rate is.

I have used various versions of MKVmerge with no luck. Some have said the problem is the header compression funtion. My files are unplayable if I don't select "none" but that doesn't fix my problem. The only other possible solution I have found was to remux with AVI-mux-GUI. I tried it on both the original file and the altered 24fps file with no luck - same problem. I don't know much about this sort of stuff, but the only thing I can think of is that the video quality of the file is beyond what my player can handle. I've had great luck in the past with every other MKV file. One was in a different language and I successfully used MKVcleaver and MKVmerge to change the language - my player can't change subtitles or skip chapters, etc with MKV files. So at least in that situation MKVmerge and extract did work.

I have attempted to use the Media Info program so I can offer the details of the file, but I can't get it to work. Anything I try in "run" makes the black screen pop up and quicly close.

I think my only other option is to use tsmuxer to create an AVCHD file and burn to disk. My player can play those with full fuction of features (unlike MKV). However I would need to buy a dual layer dvd writer to try it - I'd be pretty dissappointed if that didn't work either.

Any Ideas? Any info would be greatly appreciated! and sorry this is a bit long-winded

THANKS

Here are some other observations which have been a bit troubling for me:
TSmuxer can't output to mkv
AVImuxGUI won't accept an h264 video track but will accept ac3 & also MKV files can't convert to AVI - I thought that might offer some info about the problem if an AVI version did work

[aedipuss]

sounds like you have more problems then just the badly made mkv file. might be time to re-format and start fresh.

[dave in or]

You mean reinstall XP? I can do that easily and I've been meaning to do it for awhile. What makes you think that would be the problem? - since the video doesn't have the same issue when played on the computer.

[mail2tom]

I've had good luck using TFM AudioTool to slow down the audio to 23.976. This tool will take the MKV file without splitting the audio and video and adjust the audio as you indicate in the GUI. I then open MKVMerge, add the original MKV file and add the new adjusted audio track. I unselect the audio track in the original MKV file and adjust the video to 24000/1001 then merge them. Works well for me as long as there are no problems with the original file.