Audio loss with AVCHD files

[tuletti]

Hi.
I have a problem using Videostudio X10.
I recorded a musical with my cam Panasonic HC-V750; as usual, after 4 GB of data, the cam starts to write another file (span).
When I import these 2 files in the timeline, there is an audio loss at the end of the first one ... just one second or less ... but I can listen a stop in the music.
I don't know why Videostudio X10 do this; if a MUX the 2 files with the DOS copy command, I haven't any audio loss.
Where is my mistake ?

Thanks.

[aljimenez]

Did you try rendering/Share the two clip timeline? It's possible the audio skip you are hearing is playing the transition in Project mode, but the output will be fine. Also, perhaps you might try Proxy files. I have done what you are doing and have noticed no audio skips.

If you continue to have issues, please give the format properties of your video files.

[tuletti]

Thanks for the reply.
Unfortunately I have the audio gap also in the output file.
I noticed that also the second file has a problem; when I open it with Media Player it's all ok; when I put it in the timeline, Visualstudio truncate some frame at the start.
I uploaded the first 10 second into google drive, if you whant to try (https://drive.google.com/open?id=1OcWPq ... i1MYkE8eAN)
If you play the video with mediaplayer the first word you will able to listen are "DAMMI DAMMI" ... two times "DAMMI" (means GIVE ME in english ).
If you put in timeline and play it you will listen only one "DAMMI"; some frame were missing.
And also rendered in mp4 you will listen only one "DAMMI".
Why visualstudio lost the frame? Or it's only my VisualStudio ?

[asik1]

it's a known issue, I don't know of any remedy in VS.
(maybe "import from digital"?)
I never record long "shots"
I always stop/start on applause or similar options.

Panasonic software will import with no gaps.

[aljimenez]

Clip does the same in my VS2018, I wonder if there is something unusual in the front of that video clip identifying it as a continuation that is fooling VS? The clip has a little hiccup at the start, after the first DAMMI, when I play it with VLC; thus I think there is something unusual there. My Windows Media Player does OK with it, no hiccups.

You say that if you use the copy command to MUX the two video clips together, then there is no hiccup at all, and that is very interesting and it says to me there is some dependence on the end of the first clip to the second clip. Perhaps that is the only way to handle these long video captures with VS at this time.

[lata]

Hi

I converted to MP4 using Format Factory, that version plays ok.
The new video contains 260 frames compared to 246 for the m2ts,
I know that VS seems to duplicate the first 2 frames but this sound issue seems a little different

I notice the sample is M2ts Is this direct from camera or after burning a disc?
I would expect MTS from camera.

Post updated, using another tool it does appear there are only 246 frames in this video not 260 as FF converts it. Confusing

[tuletti]

it's a known issue, I don't know of any remedy in VS.
(maybe "import from digital"?)
I never record long "shots"
I always stop/start on applause or similar options.

Panasonic software will import with no gaps.

"import from digital" doesn't solve the problem.

If I use Panasonic software (AE Writer 5.2) and i choose "copy to PC", I see one file in the program but it makes two file on file system; there's no possibilities to obtain one file.

[tuletti]

Hi

I notice the sample is M2ts Is this direct from camera or after burning a disc?
I would expect MTS from camera.

I cut the original file (4 GB) with tsMuxeR and makes m2ts file.
Also Panasonic software makes m2ts file.

File from camera is MTS; but I think that the container doesn't make the difference.

[aljimenez]

I cut the original file (4 GB) with tsMuxeR and makes m2ts file.

Hmmm, this is a big piece of new detail. Are you saying, the two video files were not created by the camera, but the camera file was cut by a different software? If this is the case, I think this may explain the cut was not done properly. Compressed video files, like MTS, have much dependence, they can only be cut along GOP ("group of pictures") breaks. I expect Panasonic to break their video files at a proper place, but other software may not do this properly.

[tuletti]

I cut the original file (4 GB) with tsMuxeR and makes m2ts file.

Are you saying, the two video files were not created by the camera, but the camera file was cut by a different software?

No no no ... wait a moment; there's a misunderstanding.I badly explained myself.

I cut the file with tsMuxeR in order to give you a clip to try; otherwise I have to upload to google drive a large file (the original file).
The problem I noticed is with original file recorded from camera (MTS files).
But, as you can see, also with a part of the original file, the problem happen.

[asik1]

tuletti,
If you must correct that, make the joint with AE Writer 5.2, but export just 10sec. and use that clip to fix in VS.
If you google you will find many reports on that in all camcorders for the last 10 years.
Next time don't record "forever" but cut occasionally (file size is depend on the quality)

[tuletti]

make the joint with AE Writer 5.2, but export just 10sec. and use that clip to fix in VS.

Sorry but I don't understand what I have to do with AE writer (and how).

If you google you will find many reports on that in all camcorders for the last 10 years.

Do you mean about the audio loss?

Next time don't record "forever" but cut occasionally (file size is depend on the quality)

Ok but I think that it's a problem of VS.
Maybe other software render the files in the right way.

[asik1]

make the joint with AE Writer 5.2, but export just 10sec. and use that clip to fix in VS.

Sorry but I don't understand what I have to do with AE writer (and how).

Load the 2 files to AE, check the Dami Dami at the joint and export/render just 10 sec around that.

If you google you will find many reports on that in all camcorders for the last 10 years.

Do you mean about the audio loss?

Yes

Next time don't record "forever" but cut occasionally (file size is depend on the quality)

Ok but I think that it's a problem of VS.
Maybe other software render the files in the right way.

Maybe... I don't know .
Google on the problem and you might hit a full solution also