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[Bug] No sound on Xvid+mp3
04-08-2012, 05:27 PM
Post: #1
No sound on Xvid+mp3
There is no sound while watching this video http://rutracker.org/forum/viewtopic.php?t=4013801

A300 connected directly to TV by HDMI cable.
Info shows correct MPEG1 audio track.
Mediainfo shows perfectly standard rip:

General
Complete name : \\192.168.1.33\d$\Video_4\!downloads\projektorperishilton.(125).www.kvnforall.in​fo.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 350 MiB
Duration : 29mn 33s
Overall bit rate : 1 654 Kbps
Writing library : VirtualDub build 30080/release

Video
ID : 0
Format : MPEG-4 Visual
Format profile : Advanced Simple@L5
Format settings, BVOP : 2
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (MPEG)
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 29mn 33s
Bit rate : 1 548 Kbps
Width : 720 pixels
Height : 400 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.215
Stream size : 327 MiB (94%)
Writing library : XviD 1.2.1 (UTC 2008-12-04)

Audio
ID : 1
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Codec ID : 55
Codec ID/Hint : MP3
Duration : 29mn 33s
Bit rate mode : Constant
Bit rate : 96.0 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 20.3 MiB (6%)
Alignment : Split accross interleaves
Interleave, duration : 40 ms (1.00 video frame)
Interleave, preload duration : 500 ms
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04-08-2012, 07:25 PM
Post: #2
RE: No sound on Xvid+mp3
Run the file through avimux 90% of the time with no audio its bad header/riff data in the avi takes about 30 seconds rebuild it with avimux
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04-09-2012, 05:14 AM
Post: #3
RE: No sound on Xvid+mp3
(04-08-2012 07:25 PM)halfelite Wrote:  Run the file through avimux 90% of the time with no audio its bad header/riff data in the avi takes about 30 seconds rebuild it with avimux

Thank you for advice. But this is still a bug because at least 2 media players play this file (as well as other episodes) perfectly: Popcorn A110 and WD TV Live. So A300 must understand this header or whatever as well.

In addition VirtualDub is the most used mixer, A300 must support it.

What about 1 channel (mono)? Maybe A300 can only play stereo?
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04-09-2012, 05:16 AM
Post: #4
RE: No sound on Xvid+mp3
that might be it there has been off and on things for mono, if it plays on both A110 and wdtv live it should play you should cut a sample and upload for others to test as a mediainfo report doesnt give the syabas devs much to go by.
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04-09-2012, 05:32 AM
Post: #5
RE: No sound on Xvid+mp3
Ok. Can you advise how to cut a sample (without spoiling any headers)?
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04-09-2012, 05:37 AM
Post: #6
RE: No sound on Xvid+mp3
that is the issue, a cut will rebuild it. but if you cut it and rebuild and it still has issues it would point to something else,
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04-09-2012, 05:51 AM
Post: #7
RE: No sound on Xvid+mp3
Could you please just get the file here? http://kvn.rusdivx.net/download.php?id=1...fo.torrent
I verified this torrent, download took just 2 minutes, no registration was needed.
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04-09-2012, 03:38 PM
Post: #8
RE: No sound on Xvid+mp3
Collected more information.
1. Run the file through old VirtualDub 1.5.1 - still no sound
2. Downloaded another rip of the same show (Xvid+mp3 stereo) - sound is Ok
3. Mixed video from the 1st file with stereo sound from the 2nd - sound is Ok
4. Changed audio settings: PCM Passthrough -> Downmix - sound is Ok for all files!

In short, MPEG1 MONO does not work when PCM is set to Passthrough.
MPEG1 stereo works regardless of this setting.

Please fix this bug. I believe PCM setting should not affect MPEG1 mono sound.

This applies to HDMI only. Sound through SPDIF is Ok for all of the above.
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