No sound in .ts HEVC record

[frkotou]

Hi,

I have problem with audio in .ts HEVC/H265 record from DVB-T2 TV Channel. In VLC I see 2 audio channels (1 original, 1 silent audio description), but in Avidemux is only 1 audio channel (probably silent audio description). I have latest version of Avidemux.


=====================================================
Video
=====================================================
Codec 4CC:      H265
Image Size:      960 x 540
Aspect Ratio:      1:1 (1:1)
Frame Rate:      50.000 frames/s
Total Duration:      00:08:59.740

=====================================================
Extra Video Properties
=====================================================
ExtraDataSize:      00

=====================================================
Audio
=====================================================
Codec:         AAC
Channels:      Mono
Bitrate:      16000 Bps / 128 kbps
Frequency:      48000 Hz
Total Duration:      00:08:59.388

[eumagga0x2a]

Please provide a sample.

[Jan Gruuthuse]

You did use the Avidemux Menu (Top): Audio: Select Track:
In the 'Audio Tracks Configuration' window you can see up to 4 tracks. The [V] enabled are found tracks.
Let us know

[frkotou]

In audio track list is only one track. Sample: https://drive.google.com/file/d/1obAPUyCQP1Q0suLvpVrRR4EMY9pAAjRu/view

[Jan Gruuthuse]

1.9 GB is not a sample
Can you record 10 seconds up to one minute max from the DVB-T2 TV Channel?
Most likely this happens just before the switch to main event event. Like cut from (commercial) break. dvb-t(2) can switch in stream from stereo, ... to ac3,... (now guessing this could be going on) thats why sample needed of this.

[Jan Gruuthuse]

Yes confirmed. Plenty of extra data in that stream. Avidemux does not recognize the 2nd audio track.
ffprobe and MediaInfo info text below:

[frkotou]

I'm sorry, I could not make it any shorter now. So you do not need it anymore? Will Avidemux ever be able to work with these audio tracks?

[Jan Gruuthuse]

Most likely yes, if the developers recognize the issue and time permitting.

Temporary workaround.
- Remux with mkvtoolnix, 2 audio tracks are now accessible. (https://mkvtoolnix.download/)
- Drag and drop onto Audacity, both audio tracks are there. (https://www.audacityteam.org/)
select the one with 2 audio channels

[frkotou]

Ok, thank you so much.

[Jan Gruuthuse]

Audacity has problems to, with the audio: 15 minutes is silent
mkvtoolnix only working solution. for now

[Jan Gruuthuse]

Prepared a 300 MB block copy to upload, will follow shortly

Code Select Expand

dd if=000.ts of=sample_for_avidemux000.ts bs=300M count=1

[Jan Gruuthuse]

For developers to test:
1 file: sample_for_avidemux000.ts 300 MB in total ・ Will be deleted on 28 June, 2018
Download link: https://we.tl/1257OsT0jn

test cz dual audio track

[frkotou]

(For info) I didn't use Audacity. I extracted the one of mka track and formatted it into AAC using FormatFactory. In Avidemux, I replaced the silent track with new extracted track and only made a video and audio shift and everything works.

[eumagga0x2a]

Thank you for the sample. I don't think I'll be able to fix this (but hopefully Mean will be able to step in), Avidemux sees the PID in the PMT, but when looking for AAC extra data, it doesn't find the required marker specific to LATM streams.