Mpeg2 Video Stuttering...

OhmGautama · Post by **OhmGautama** » Tue May 08, 2007 12:00 pm

After exporting my video from TMPGenc as an MPEG-2 , it looks great until around 3:50 and the video and sound begins to stutter and skip. The video is still there, and if I skip over the part at 3:50 , the rest of the video/sound works fine. Ive also exported a MP4 version and it works fine , even at the 3:50 mark. The lossless version ive exported also works fine at that point as well, so I don't think the source is a problem.

Any idea what may be causing this? If I left out any information you may need let me know. Thanks yet again!

bobstur · Post by **bobstur** » Tue May 08, 2007 4:11 pm

well if the lossless(lagarith) codec works
why dont u render your video in lossless and then open vir dub mod and try to convert it in to MPEG 2.

Scintilla · Post by **Scintilla** » Tue May 08, 2007 5:45 pm

@bobstur: VirtualDubMod can encode MPEG-2 files?

Anyway, what were your encoding settings? I remember having this kind of problem once before, and I want to say that reducing the maximum bitrate would fix it, but I'm not sure.

OhmGautama · Post by **OhmGautama** » Tue May 08, 2007 6:57 pm

My settings are :

Stream Type : MPEG-2

Size : 720x480

Frame rate : 29.97 fps

Rate control mode : Automatic VBR (CQ_VBR)
Quality - Highest
Maximum Bitrate - 15000 kbits/sec

Profile & Level : Main Profile and Main Level

Video format : NTSC

Encode mode : Non-interlace

YUV Format : 4:2:0

DC component precision : 8 bits

OhmGautama · Post by **OhmGautama** » Tue May 08, 2007 7:04 pm

I was thinking maybe it was the maximum bitrate as well, but I havent tried to lower it yet. It stops at a point in my video, where it (purposefully done) goes black for a few seconds and then goes back to video. I dont know if that may affect it or not.

bobstur · Post by **bobstur** » Wed May 09, 2007 1:26 am

Scintilla wrote:@bobstur: VirtualDubMod can encode MPEG-2 files?

Anyway, what were your encoding settings? I remember having this kind of problem once before, and I want to say that reducing the maximum bitrate would fix it, but I'm not sure.

i think with plugins will can encode MPEG 2 . dunno. i havent done it before. i know that river past video cleaner can encode MPEG 2. cuz i use to do it. XD

OhmGautama · Post by **OhmGautama** » Wed May 09, 2007 6:01 pm

I tried to lower the bitrate but it didnt help. I switched over from MPEG-2 to MPEG-1 , and the MPEG-1 version worked fine too, even with a high bitrate. It must have something to do with the MPEG-2 , but what Im still not sure.

Scintilla · Post by **Scintilla** » Wed May 09, 2007 7:06 pm

You said it was on a scene of pure black, right? How about <i>raising</i> the <i>minimum</i> bitrate -- say, to about 500 Kbps -- and enabling padding not to be less than that?

OhmGautama · Post by **OhmGautama** » Wed May 09, 2007 9:00 pm

Ah that must have been it! Thanks so much! Thanks for your suggestion as well bobstur. I tried a minimum of 500 kb/s but still came up with the same problem, so I went for broke and put it at 10000 kb/s and that got it. Of course I got a 400 mb mpeg-2 file but at least I know what I need to do now. Thanks again, very helpful!

Keeper of Hellfire · Post by **Keeper of Hellfire** » Thu May 10, 2007 12:30 pm

RathiSponge wrote:I tried a minimum of 500 kb/s but still came up with the same problem, so I went for broke and put it at 10000 kb/s and that got it.

I hope that's a typo and you did set the minimum rate to 1,000 kb/s.

While all other settings read like for DVD, the maximum bit rate isn't. For a DVD, the sum of all streams must not exceed 9,800 kb/s