329 replies to this topic

[athoik]

Dear betacentauri,

 

Yes probably that will do the job . I will test it and come back with the patch.

[athoik]

Dear All,

 

 

I created a patch as betacentauri suggested but this sample has the same behaviour (although i need to do more testing to be 100% sure).

 

 0001-Set-only-by-hardware-supported-audio-mpeg-4-profile.patch.txt   3KB   5 downloads

 

I think this is not working because of this patch applied recently on dreambox dvbmediasink. I will try with OpenPLi dvbmediasink and see if sample has different behaviour on sound switching.

 

Can you understand what this patch tries to do? It forces to use AAC LC?

[betacentauri]

As far as i can see and understand does the patch set the sample rate, channel config,... in the adts_header. And also patches object type to AAC lc if other profiles are used.
But this shouldn't be a problem. With the changed caps (profile=lc) the dvbmediasink shouldn't be used for decoding of AAC data without lc profile. This should be done by faad decoder.
I can take a deeper look at it later this day. What profile and what type does your sample have?
I have used AAC data with ltp profile and a Mkv with main profile.

[athoik]

 What profile and what type does your sample have?

 

Here is the output of mediainfo from the sample.

 

Spoiler

General
Unique ID                                : 248026584971210771654735750392933366619 (0xBA982EC56DA1B1AEA7CD99D0B57DBB5B)
Complete name                            : sample.mkv
Format                                   : Matroska
Format version                           : Version 2
File size                                : 24.8 MiB
Duration                                 : 1mn 4s
Overall bit rate                         : 3 196 Kbps
Movie name                               : ......~-~$~TheAaax9~$~-~......
Encoded date                             : UTC 2011-11-04 23:18:53
Writing application                      : mkvmerge v5.0.1 ('Es ist Sommer') built on Oct  9 2011 11:55:43
Writing library                          : libebml v1.2.2 + libmatroska v1.3.0

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L5.1
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 2 frames
Muxing mode                              : Header stripping
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 1mn 4s
Width                                    : 1 920 pixels
Height                                   : 816 pixels
Display aspect ratio                     : 2.35:1
Frame rate                               : 23.976 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Title                                    : TheAaax9
Default                                  : Yes
Forced                                   : No

Audio #1
ID                                       : 2
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Mode extension                           : CM (complete main)
Muxing mode                              : Header stripping
Codec ID                                 : A_AC3
Duration                                 : 1mn 4s
Bit rate mode                            : Constant
Bit rate                                 : 448 Kbps
Channel(s)                               : 6 channels
Channel positions                        : Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Compression mode                         : Lossy
Delay relative to video                  : 7ms
Stream size                              : 3.47 MiB (14%)
Title                                    : TheAaax9
Language                                 : Hindi
Default                                  : Yes
Forced                                   : No

Audio #2
ID                                       : 3
Format                                   : AAC
Format/Info                              : Advanced Audio Codec
Format profile                           : LC
Codec ID                                 : A_AAC
Duration                                 : 1mn 4s
Channel(s)                               : 6 channels
Channel positions                        : Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Delay relative to video                  : 18ms
Title                                    : TheAaax9
Language                                 : English
Default                                  : No
Forced                                   : No

Text
ID                                       : 4
Format                                   : UTF-8
Codec ID                                 : S_TEXT/UTF8
Codec ID/Info                            : UTF-8 Plain Text
Title                                    : TheAaax9
Language                                 : English
Default                                  : Yes
Forced                                   : No

 

Most probably your patch solves a completely different issue (not the problem when switching from AAC to AC3). It can play AAC files with profile different than LC.

 

Do you have a sample file to test patch (profile = (string) lc) if it works on dreambox? If it works we can apply patch for dreambox dvbmediasink too.

[betacentauri]

My patch doesn't solve the ac3 AAC switching problem.
With my patch you can hear sound when you use AAC with e.g main or ltp profile.
I have a test file. I'll send it to you or post a link after work.

[betacentauri]

For testing you can use this test file:

http://download.wave...bps_48000Hz.AAC

 

Without my patch I cannot hear audio. If it's the same for dreamboxes, I don't know.

[athoik]

For testing you can use this test file:

http://download.wave...bps_48000Hz.AAC

 

Without my patch I cannot hear audio. If it's the same for dreamboxes, I don't know.

 

It's the same

 

With the changes proposed, the above sample works. Great job betacentauri.

 

The following file patches dreambox dvbmediasink.

 0001-Set-only-by-hardware-supported-audio-mpeg-4-profile.patch.txt   3KB   11 downloads

Edited by athoik, 5 July 2013 - 19:26.

[betacentauri]

In another forum biki3 told me that he has problems with mkv with ac3 and aac tracks. If you start with ac3 you can hear sound. Then switch to aac (which also works) and then back to ac3. Then you cannot here anything. If you start with aac track (works) and switch to ac3, you cannot hear anything.

Does anybody have an idea, what the problem is and how to solve it?

 

I found a solution for this . It's a little bug in the dvbaudiosink. Once an aac track was selected, self->aac_adts_header_valid was set to true. Changing audio track back to ac3 track didn't change that flag. This had the effect that always an aac adts header was added to the pes packet.

Attached is a patch to solve this problem.

Attached Files

•  0001-Fix-ac3-audio-playback-if-aac-track-is-present.patch.txt   753bytes   10 downloads

[pieterg]

thanks, well spotted. Pushed it.

[betacentauri]

Thanks! Found it (luckily) by accident. I only wanted to check whether data is written to audio device. And there I saw that the pes header size changed while switching track, which is normal but not different sizes for one track...

[betacentauri]

@Athoik: Now it's your turn to patch dreambox dvbmediasink

  It looks like dreambox dvbmediasink has the same error...

[athoik]

@Athoik: Now it's your turn to patch dreambox dvbmediasink

  It looks like dreambox dvbmediasink has the same error...

 

Yes it does

 

I will test the same fix on dreambox dvbmediasink.

 

Well done betacentauri!

[athoik]

I will test the same fix on dreambox dvbmediasink.

 

It works also on dreambox dvbmediasink.

 

Here is the patch.

 0001-Fix-ac3-audio-playback-if-aac-track-is-present.patch.txt   3.04KB   15 downloads

[salimda]

hi

still this stream not working m3u8 http://37.46.199.34:.../playplist.m3u8

you can check to see why not working and I m using latest enigma openpli3.0

thanks

[athoik]

hi

still this stream not working m3u8 http://37.46.199.34:.../playplist.m3u8

you can check to see why not working and I m using latest enigma openpli3.0

thanks

 

 It's the third time asking exactly the same think! Because segments are encrypted!

 

Just read here for a possible solution using GreekStreamTV.

Edited by athoik, 13 July 2013 - 17:12.

[salimda]

hi

sorry but I m not asking to play stream with GreekStreamTV.

I m asking for help to play stream with the bouquet and trying to play stream with  GreekStreamTV not working either.

thanks

hi

still this stream not working m3u8 http://37.46.199.34:.../playplist.m3u8

you can check to see why not working and I m using latest enigma openpli3.0

thanks

 

 It's the third time asking exactly the same think! Because segments are encrypted!

 

Just read here for a possible solution using GreekStreamTV.

[athoik]

with  GreekStreamTV not working either.

 

it's working.

 

 test.jpg   74.74KB   58 downloads

[athoik]

I will test the same fix on dreambox dvbmediasink.

 

It works also on dreambox dvbmediasink.

 

Here is the patch.

0001-Fix-ac3-audio-playback-if-aac-track-is-present.patch.txt

 

Here is the patch removing above fix. Original dvbmediasink is fixed (probably better, since it fixes a possible memory leak also).

 

 0001-Remove-patch-for-ac3-audio-playback-if-aac-track-is-.patch.txt   3.01KB   26 downloads

 

 

Thanks to Persian Prince for noticing the update.

[littlesat]

pieterg did just made a commit...

[pieterg]

I just reverted the commit, keeps the history clear