Choppy video when converting .mkv to h.264

[ammonkc]

I'm trying to convert a large 720p .mkv file to h.264. But the resulting file is very choppy. the source file is 1280x720 .mkv (matroska) 3.1mbps video. I'm using h.264 (mencoder) to transcode it to 1280x720 1.5mbps. The source video is very smooth but the transcoded video is really choppy and stuttery. What am I doing wrong?

Any tips on the best codec and settings to use to convert a video like this to h.264? Thanks

[GregA]

Are you changing the frames-per-second between the original and new version?

[ammonkc]

Yes, I'm leaving the frames rate at 23.976. The source file is 720p so it is a very large file, about 1GB. Could it just be too large of a file, that the codec is starting to choke?

The source file is actually h.264 in an .mkv wrapper. I would like to just do a passthrough and convert the format to .mp4. is this possible? when I select passthrough it will only export to .avi.

[hashshashin1212]

I'm having the exact same problem. I have some large 1080p and 720p mkv files. Visualhub will convert them with the Apple TV present, but the end result (mp4 file) comes out choppy (dropping frames) on both ATV and Quicktime. I'm not changing the frame rate on the source files since they are already set at 24fps (23.976).
I've also tried Handbrake, I found that it will lower thet resolution much lower than 720p and if I used the ATV legacy present it will keep it at 1080p for those 1080p mkvs (no problems with the 720p files).

My question is: Has anybody found a one stop solution to this problem with Visualhub with dropping frames??
Is there a way I can drop both my 1080p and 720p mkv files and convert them to ATV HD friendly files without any choppy end result?

Thanks in advance.

Output settings used in Visualhub:
Apple TV present
Quality: Go nuts
Frame rate: same as source
Dimesions: 1280x720 or 1280x544 (if differen from source: auto)
Other: best quality mp4
Audio: AAC 160, 192, 320 (depending on source)

Am I doing something wrong?

[aedipuss]

the software - visualhub - was discontinued 3 years ago. much like all the threads you have been grave robbing. not much help is going to be found. people move on to current software.