Audio stops working on specific time points

[Ivanatis]

Hello,

I have an audio-related question here. I have a video file of about half an hour and there are like 6 or 7 occasions when the audio stops working and sound is completely gone. Does not come back on its own. When it happens, I can indirectly fix it by selecting the option to disable the audio track and enable it again and then it is back. It's pretty annoying though. The thing is also that it happens at the exact same moments every time for example at 22:17. I thought that maybe the file is corrupted, but I tried playing the file with other media players and it works perfect there. No audio issues whatsoever. Can you tell me how to solve this? I already tried to reinstall VLC media player to the newest version, but the problem remains. It's also something I don't have with every video file by the way. The ones where it happens are all mp4, but I have other (equally long) mp4 files where there is no issue. Thanks in advance.

[Lotesdelere]

Please open Tools -> Messages (set Verbosity to 2) before you start the playback, and then paste the full resulting log here or on Pastebin.com if it's too long.

Also upload a short sample of your original problematic file to Zippyshare.com or to WeTransfer.com and then post the link to the file here.
https://www.zippyshare.com
https://wetransfer.com

If needed cut it with DGsplit and read here about how to do it:
https://forum.videolan.org/viewtopic.ph ... 35#p193335
100 MB max should be enough.

[Ivanatis]

https://pastebin.com/ugdBkM1A

[Lotesdelere]

mmdevice debug: state changed: 1
faad warning: Bitstream value not allowed by specification
faad warning: Maximum number of bitstream elements exceeded
...
faad warning: First SBR frame is not the same as first AAC frame

Please post a sample file.

[Ivanatis]

I can't. Tried it with DGsplit and I am getting a totally broken file that does not show anything. Then I used https://online-video-cutter.com/ and it's working there, but I cannot recreate the error. In the new 30-second file the audio is perfectly fine and that is exactly where it vanishes in the original file.

[Lotesdelere]

The reason why we want a binary cut sample from the original file.
Just post the file made with DGsplit and I'll check it.

[Ivanatis]

Thank you Lotesdelere.

I see neither video nor hear audio with the DGsplit segments, so dont know which one to send.

I uploaded the entire thing now, it's slightly over 200 MB. One occasion where the sound suddenly stops for me every time would be 36:03.

https://we.tl/t-wdzIMcW73i

[Lotesdelere]

The AAC audio stream of this file has big problems:

Code: Select all

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\temp\2.mp4': 0B f=0/0 Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 Duration: 00:41:42.96, start: 0.000000, bitrate: 718 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x352 [SAR 1:1 DAR 20:11], 579 kb/s, 25 fps, 300 tbr, 90k tbn, 50 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 131 kb/s (default) Metadata: handler_name : VideoHandler [aac @ 000000736c76e040] decode_band_types: Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (54) exceeds limit (41).3 [aac @ 000000736c76e040] Number of bands (69) exceeds limit (41).1 [aac @ 000000736c76e040] skip_data_stream_element: Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (52) exceeds limit (41).5 [aac @ 000000736c76e040] Number of bands (53) exceeds limit (41).1 [aac @ 000000736c76e040] Input buffer exhausted before END element found [aac @ 000000736c76e040] TYPE_FIL: Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (53) exceeds limit (41).0 [aac @ 000000736c76e040] Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (46) exceeds limit (41).4 [aac @ 000000736c76e040] channel element 2.6 is not allocated=0/80 [aac @ 000000736c76e040] Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (47) exceeds limit (41).5 [aac @ 000000736c76e040] Number of bands (17) exceeds limit (12).03 [aac @ 000000736c76e040] Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (44) exceeds limit (41).17 [aac @ 000000736c76e040] Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (43) exceeds limit (41).30 [aac @ 000000736c76e040] Number of bands (45) exceeds limit (41).36 [aac @ 000000736c76e040] Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (53) exceeds limit (41).49 [aac @ 000000736c76e040] Number of bands (16) exceeds limit (12).58 [aac @ 000000736c76e040] Number of bands (50) exceeds limit (41).65 [aac @ 000000736c76e040] Number of bands (54) exceeds limit (41).73 [aac @ 000000736c76e040] invalid band type 63KB sq= 0B f=0/181 [aac @ 000000736c76e040] Number of bands (56) exceeds limit (41).89 [aac @ 000000736c76e040] invalid band type 62KB sq= 0B f=0/196 [aac @ 000000736c76e040] Number of bands (49) exceeds limit (41).03 [aac @ 000000736c76e040] Number of bands (47) exceeds limit (41).11 [aac @ 000000736c76e040] Input buffer exhausted before END element found [aac @ 000000736c76e040] Number of bands (43) exceeds limit (41).27

And remuxing the file doesn't help, so I'm afraid there is not much you can do.

[Ivanatis]

okay I see oh well, it just confuses me that I had no problem with other player and also not with VLC when I extracted the specific segment

[mederi]

& jerky video. The media file is really bad, but indeed some other player can play the audio without interruption.