When I create DVD from a DVB-T recording of a program I get strange audio track behavior. Recording contains M2V video and both AC3 and MP2 audio tracks. I select AC3 as default during DVD creation. When I play resulting DVD I get the AC3 audio to beginning with. After about 1 h the sound disappears. If I then switch audio track to MP2 track I get sound again. AC3 is quiet for the rest of program duration. I get this when using a standalone DVD player and WinDVD, Windows Media Player, and VLC. It is the same whether I play from disk or directory.
If I open separate VOB files in one of above PC player programs then, for VOB files up to the one where AC3 sound disappears I can se and switch between both AC3 and MP2 tracks. The rest of VOB files contain only MP2 track.
When I demultiplex only the original recording, I get M2V, AC3 and MP2 files. Both AC3 and MP2 contain full length audio tracks. Then I can listen to the whole program sound playing AC3 file.
When I remultiplex using M2V and AC3, then the resulting MPG file has the same strange behavior. Also during pass 2 the log says “INTERNAL ERROR: additional data required but no free space in input buffer". During pass 1 there are some invalid AC3 frame errors.
I run DVR-Studio Pro 1.05. What can be wrong?
Thanks/Mikael
Disappearing AC3
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Mikael Hakman
- Beiträge: 8
- Registriert: 22.01.2006, 00:50
@Mikael
have you already tried the latest Version 1.08 Beta 5? If it happens there I would need exactly the bit of the recording, where these invalid frames happen. That's a bit difficult, I know:
- Note the time, in the demux-window, where the problem happens
- Define a cut-area from start of recording to about the time noted minus 10 seconds
- Define a cut-area from the time noted plus about 10 seconds until the end of the recording
- Now use "Copy edited recording" and this will result in an additional recording file of about 6-8MByte of size. Please email it to me.
First try if the invalid frames show up in the short piece, too.
have you already tried the latest Version 1.08 Beta 5? If it happens there I would need exactly the bit of the recording, where these invalid frames happen. That's a bit difficult, I know:
- Note the time, in the demux-window, where the problem happens
- Define a cut-area from start of recording to about the time noted minus 10 seconds
- Define a cut-area from the time noted plus about 10 seconds until the end of the recording
- Now use "Copy edited recording" and this will result in an additional recording file of about 6-8MByte of size. Please email it to me.
First try if the invalid frames show up in the short piece, too.
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Mikael Hakman
- Beiträge: 8
- Registriert: 22.01.2006, 00:50
The same behavior in 1.08 Beta 5. I'll come back with recording sample if I manage to isolate the error, otherwise I would have to send you a DL DVD with original HAV file (8 GB).Kimi hat geschrieben:
have you already tried the latest Version 1.08 Beta 5? If it happens there I would need exactly the bit of the recording, where these invalid frames happen.
/Mikael
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Mikael Hakman
- Beiträge: 8
- Registriert: 22.01.2006, 00:50
20 seconds centered at the problem (14 MB HAV) gives VOB that plays ok but some frames are not there anymore (as compared to whole recordings). These are the frames where sound disappears in the whole VOB. 2 minutes centered at the problem (90 MB HAV) gives VOB that still plays sound on both sides of the problem but now you can hear very short, high pitch sound (a spike) at the problem time. In the original recordings there are some visible distortions (signal errors) just before problem place. These are, I suppose, DVB-T transmission errors – not uncommon but not very frequent at my place.Kimi hat geschrieben: First try if the invalid frames show up in the short piece, too.
I think those errors cause the problem. I also understand that it is not a simple matter for DVR-Studio to take care of all weird kinds of errors. However in DVB-T there will be errors from time to time so it would be good to do the best that can be done. When playing the recordings in my DVB-T PVR box where the file was stored when it was received, the AC3 sound doesn’t disappear.
What would you like me to do? Send you 14 MB or 90 MB or both files to you? Can your inbox accommodate these sizes? Or shall we try to find a way to send you the whole 8 GB recordings? It’s Amadeus – the uncut version of the movie.
Regards/Mikael
@Mikael
you could try to cut out the problem area. DVR-Studio does try to handle these problems. Most of the time it leaves out one or two GOPs - that's about 1 or 2 seconds of the movie. So just define a cut of about 2 seconds in length around the problem area. This should result in a shor skip in the movie, but there is no other solution.
Best would be if DVR-Studio would do it on it's own, of course. You can upload the large piece (90 MByte) on my FTP-Server. I send you the login-data by private mail. I would be glad, if you have a larger piece for me, where the disappearing error happenes. I can be 500MByte if neccessary. It's just a matter of upload-time. I think 8Gbyte would take days...
you could try to cut out the problem area. DVR-Studio does try to handle these problems. Most of the time it leaves out one or two GOPs - that's about 1 or 2 seconds of the movie. So just define a cut of about 2 seconds in length around the problem area. This should result in a shor skip in the movie, but there is no other solution.
Best would be if DVR-Studio would do it on it's own, of course. You can upload the large piece (90 MByte) on my FTP-Server. I send you the login-data by private mail. I would be glad, if you have a larger piece for me, where the disappearing error happenes. I can be 500MByte if neccessary. It's just a matter of upload-time. I think 8Gbyte would take days...
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Mikael Hakman
- Beiträge: 8
- Registriert: 22.01.2006, 00:50