Audio / Video jitters with last two conversions

[Dropbear]

Over the last two nights I have used 1.0.6 b3 to convert PAL R4 "13 Days" and PAL R4 "Double Jeopardy"..

In 13 days, towards the end of the second CD, the audio and to a lesser extent the video starts to "jitter" or freeze for a very short period of time. The audio cuts out and in a bit. This continues on through most of the third CD as well, although it's watchable with annoyance.

I burnt a copy of the first disk of Double Jeopardy this morning before work and I seem to be getting the same sort of problem - again it doesn't start till midway through the disk..

Is there anything in 1.0.6 that could be causing this? Is it likely to be my burner going weird or my DVD player giving up the ghost? I have done 10's of movies with DVD2SVCD before and this is the first time I have experienced this problem. I have not changed the way I have been burning the movies either.

Any ideas?

[markrb]

Two possiblities are that 1 you need to burn your CDR at a lower speed. The Suggested speed to burn your SVCD's is 4X. I suspect this maybe the problem. Q46 of the Q + A.

Look at the Muxed_mpeg files on your HD and see if the have the same problem. Play them with PowerDVD 4.0 or WinDVD and not Media Player.

Second could be that your bitrate may be a little too high. I have noticed that in the newer version I had to drop mine to make it work in my DVD player fine.

Try playing the Disc in you computer using either Power DVD or WinDVD and see if you have this problem in the computer.

Mark

[Dropbear]

Originally posted by markrb

Second could be that your bitrate may be a little too high. I have noticed that in the newer version I had to drop mine to make it work in my DVD player fine.
Mark

Mark,

Which bitrate are you talking about here? the Average or Max ?

[markrb]

Actually for me it was both. I always put the AVG 120-150 less then the MAX.
Technically though it was the MAX that would give me problems because it only happened sometimes and not all the time.

I am leaning toward too high a speed burning because it is not uncommom to have most of the disc ok and only somewhere from the middle to the end having problems.

To test this theory play the muxed_file(not cdr disc) in a Software DVD player and if you have the same problem then it is not a problem with the burn, cd media or your Stand Alone DVD player.

Mark

[Cayne]

Hi.
I have the same problem with ver. 1.0.6
I burn at 20x but it always worked before and also checked the MPEGs on HD, the errors appeared anyways.

Did 3 Movies so far (Akira, Schuh des Manitu, Dr. T and the Women). All were Pal Movies, Dr. T was a DVB-Stream.

WinDVD also crashes when trying to play the damaged part of the movie.
PowerDVD and my Yamakawa-Standalone only show errors.

Bitrate Setup was always correct. I remember only the last one:
Audio: 128, Max 2595, Avg ~1700, Min 300. But the others also were ok.

Where could this come from? I exclude the resizing as error-source, because Dr. T already had the right source-resolution and I disabled it.

[Dropbear]

Isnt the max bitrate a lot higher in this version than in previous versions! FWIW I got the warning box saying my bitrates were too high, but I pressed on regardless.. In 1.0.6 has it changed to include this warning box by default? If not, then it must be this version that's going 'over the top' when calculating bitrates.

For info purposes, in DVD2SVCD

I changed all CD lengths to 80 mins
I do my audio at 192kbps
I do NOT downsample to 44.

[Marekp]

guys,
I have the same problem when I play the movie in my standalone SVA player.
I have checked the muxed files on the HDD and they seems to play fine using Power DVD 4.
What I was able to find out is that this is happening only when I don't have any subtitles selected on my DVD player. As soon as I select subtitles number 1 (english) my player plays everything fine.
I am using CVD subtitles and my images are burned by Nero 5.572
Any ideas?

[markrb]

If you get error playing the Muxed_Mpeg(not burned) files on the computer their is an error somwhere in the encode, either audio or video. Usually bitrates don't make much of a difference on the computer. A computer doesn't have the limitations a stand alone DVD player has.

If the file plays fine in you computer and not in your Stand Alone DVD player. There are really only three things that could be causing this if your Stand Alone DVD player normally plays SVCD's.

The first is that something went wrong in the burn. Either the media is subpar or the SVCD was burned too fast. Try a test at 4X and see if you have the same problem on the Stand Alone DVD player. If it works at 4X incrementally increase the burn speed until you get problems and then back it off. Also the burning software could have introduced problems. Try something else.

The second is that the combined bitrate of audio and video is beyond what your Stand Alone DVD player can handle. This will be most seen in demanding scenes since that is where the VBR video encode will use the highest bitrate. Reduce the Max bitrate by 100 and try the encode again. If you have used any audio bitrate higher then 224 this is probably the problem, because most DVD players cannot play SVCD audio higher then 224.

The third is an incompatility with your Stand Alone DVD player. Either it doesn't like the media or the type of disc etc... Try another brand of discs.


I am tight on time tonight or I would try to think of more things to try.

Good luck,
Mark

[Dropbear]

Hi Mark..

My media and my burn speed have remained consistant for a long while, so I am discounting them at the moment..

I'm leading towards exceeding the bitrate that my DVD player (XMS-750 can handle)... What I am asking, is, has anything changed in 1.0.6 that would INCREASE the avg or max bitrates from previous versions?


Thanks for the hint on the audio - I will check my settings.

[markrb]

The only thing I know of that changed in the 1.06 builds was the way the audio is converted.

I know that I had to drop the bitrate I have always used without issue with all the 1.06 builds. I used to encode everything at 2600 MAX and 2450 MAX AVG, but starting with 1.06.1 I was forced to drop my MAX to 2525 and my MAX AVG to 2400 or I would have problems with my Pioneer 343 player. Mostly I would get occasional audio burps, but from testing in the past I know that this is the first sign of too high a bitrate. Dropping the bitrate cured it for me.

Why changing the way the audio is converted had any effect on bitrates is beyond me. I would think 224 is 224 regardless of what encoded it. It could be something completely different to. It's just that's the only thing I know has changed.

Marekp try a test conversion without subtitles at all. Maybe there is something funky going on with them when they are not selected.

Mark

[Dropbear]

cheers mark, I'll experiment and report back ....:sly:

[Marekp]

Mark,
I haven't try yet to burn test conversion without any subtitles but what I have tried was to rebuild images of the current conversion using IAuthor. Everything is now working perfectly. I have rebuild again with VCDXBuild but the same problem occurred. Therefore I thing there must be something strange going on with VCDXBuild with a combination with my player.
In fact in past I have tried to select SVCD subtitles using VCDXBuild and it was sometimes working and sometimes not even when playing the same part of the movie. At the time it looked to me as some kind of synchronisation problem.
Using IAuthor is at the moment some kink of a pain because my new burner Sony 175 is not longer supported by Easy CD 4 and therefore I'm forced to use CDMage to convert them to bin. Not mentioning that the playlist created by DVD2SVCD has to be manually edited to fix the chapters.
Does anyone experiencing something similar or is it just me?
:confused: