converting and MKV with VFR

[derrickec]

I have an .mkv where the video track has VFR, along with a subtitle file. The end result is to play this on my iPod and be able to export it to my TV from the iPod.

On the first encode, I'm able to successfully convert the .mkv using mencoder (both MP4 and XviD) and burn the subs to the image. However, the audio is slightly off, by about a second. Since its animated (and in another language to boot), its not the end of the world, but it is frustrating since I'm shooting for quality. I know the slight desync is due to the VFR.

Is there anyway to successfully convert an .mkv with VFR to a format the iPod can take using ffmpegX, without experiencing sync issues? I've scoured the forums, and I'm not sure there is. Just wanting confirmation.

I have found a workaround for VFR in another thread, but its extensive and involves using a PC, and I'd like to stay away from that if possible.

[BeardFan]

What's the video codec of your mkv?

If it's h264, then we'll have to wait. There are several problems with ffmpeg decoding h264 including VFR. I haven't received answers to my question concerning mkv with h264 VFR. But I'm sure coming versions of ffmpeg and mencoder used in ffmpegx will play them.

If it's mpeg4/divx/xvid then it should work with the current version. Maybe you should try if ffmpeg converts the mkv correctly (converting it to a normal divx/xvid/avi). You could add the subs afterwards in a second conversion wtih mencoder.

[derrickec]

Here's the codec for the video track.

Codec ID: V_MS/VFW/FOURCC
CodecPrivate, length 40 (FourCC: DX50, 0x30355844)

So, yeah, its DivX. I'll try it with ffmpeg next and see if that produces acceptable results.

[davidr1234]

I have run into a similar problem, I have a number of .MKR video files that I would like to convert to .264 or MPEG-4 to use on ipod, I am using ffmpegx, and the file always ends up running at twice speeed with no audio.

I have tried a zillion variations of levels , what can I be doing wrong?