[Asterisk-video] app_mp4 problems

[Klaus Darilion]

ok - tomorrow.

I have now made a 3gp file with ffmpeg (libamr_nb). Audio is good, video 
is not bad, but not as smooth as helix, and after some time video looses 
sync.

Maybe if we can find out the helix settings (i-frames, p-frames ...) we 
could tweak the conversion process with ffmpeg.

klaus
Sergio Garcia wrote:
> Hi Klaus,
> 
> Could you send me the files to see what could be going wrong?
> And personally, I use Helix Mobile Producer for encoding, Quick Time is horrible,
> and ffmpeg has problems with cbr videos (and you have to enable amr manually).
> You could also try the tmn h263 encoder, I haven't tried it myself, but ratmin sent
> me an encoded video and the quality was quite good.
> 
> http://www.geocities.com/capecanaveral/Lab/2336/tmndec-3_2_0.tgz
> 
> Best regards
> Sergio
> 
> 
> ---------- Original Message ----------------------------------
> From: Klaus Darilion <klaus.mailinglists at pernau.at>
> Reply-To: Development discussion of video media support in Asterisk<asterisk-video at lists.digium.com>
> Date:  Wed, 18 Jul 2007 16:07:45 +0200
> 
>>
>> Sergio Garcia Murillo wrote:
>>> Umm.. It should work fine (i.e. not crash) with all codecs, could you get a
>>> bt of the crash?
>>> I promise to take a look at all the dumps and logs as soon as I've got any
>>> time.
>> Hi Sergio!
>>
>> I record an 3gp (from Nokia 6630) file with mp4save.
>>
>> The file looks good:
>> # mp4info record_nokia6630.3gp
>> mp4info version 1.5.0.1
>> record_nokia6630.3gp:
>> Track   Type    Info
>> 1       audio   AMR, 11.420 secs, 12 kbps, 8000 Hz
>> 2       hint    Payload AMR for track 1
>> 3       video   H.263, 3.677 secs, 127 kbps, 176x144 @ 21.484906 fps
>> 4       hint    Payload H263-1998 for track 3
>>
>> After that I try to playback this file with mp4play() - again to the 
>> Nokia 6630. Then Asterisk crashes:
>>
>>     -- Executing [1121 at PSTNin:1] h324m_gw("Zap/1-1", 
>> "play-nokia at video") in new stack
>>     -- Executing [play-nokia at video:1] 
>> Answer("Local/play-nokia at video-2b79,2", "") in new stack
>>     -- Executing [play-nokia at video:2] 
>> mp4play("Local/play-nokia at video-2b79,2", 
>> "/export/videos/record_nokia6630.3gp") in new stack
>> mp4play /export/videos/record_nokia6630.3gp
>> found hint track 2
>> track 1 soun
>> found hint track 4
>> track 3 vide
>> MP4ERROR: FindTrackId: Track index doesn't exist - track 2 type hint
>> H245 TerminalCapabilitySet TransferRequest
>> -WriteControlPDU [request]
>> Encode PDU [95]
>> Sending CMD [0,87]
>> H245 Request MasterSlaveDetermination
>> -WriteControlPDU [request]
>> Encode PDU [20]
>> Sending CMD [1,7]
>> MP4ERROR: MP4Array::[]: index 4 of 4: Numerical result out of range
>> Sending CMD [0] - 1 left
>> Really destroying SIP dialog 
>> '6a92bbab5ca9fd9d761739eb0977a906 at 83.136.32.165' Method: OPTIONS
>> MP4ERROR: MP4Array::[]: index 4 of 4: Numerical result out of range
>> Segmentation fault
>>
>>
>>
>> Then I removed the hint tracks from the recorded file and added new hint 
>> tracks. Then Asterisk does not crash, but playback does still not work:
>>
>>     -- Executing [1123 at PSTNin:1] h324m_gw("Zap/1-1", 
>> "play-nokia-new at video") in new stack
>>     -- Executing [play-nokia-new at video:1] 
>> Answer("Local/play-nokia-new at video-4056,2", "") in new stack
>>     -- Executing [play-nokia-new at video:2] 
>> mp4play("Local/play-nokia-new at video-4056,2", 
>> "/export/videos/record_nokia6630_new.3gp") in new stack
>> mp4play /export/videos/record_nokia6630_new.3gp
>> H245 TerminalCapabilitySet TransferRequest
>> found hint track 5
>> track 1 soun
>> -WriteControlPDU [request]
>> found hint track 6
>> track 3 vide
>> Encode PDU [95]
>> Sending CMD [0,87]
>> MP4ERROR: FindTrackId: Track index doesn't exist - track 2 type hint
>> H245 Request MasterSlaveDetermination
>> -WriteControlPDU [request]
>> Encode PDU [20]
>> Sending CMD [1,7]
>> Sending CMD [0] - 1 left
>> MP4ERROR: MP4Track::ReadSampleFragment: offset and/or length are too large
>> MP4ERROR: MP4Array::[]: index 1 of 1: Numerical result out of range
>> MP4ERROR: MP4Array::[]: index 2 of 1: Numerical result out of range
>>
>>
>> The only working 3gp file yet I have produced with helix mobile producer 
>> trial version. I also tried Quicktime Pro - audio works but video is 
>> very bad quality (on the mobile on even on the PC) - looks like 
>> Quicktime's encoder is bad.
>>
>> Do you have any hints how to make a good 3gp file with ffmpeg and 
>> mpeg4ip? How do I have to build ffpmeg (configure options, patches) and 
>> mpeg4ip? What are the proper commands to transcode a video?
>>
>> thanks
>> klaus
>>
>>
>>
>>
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>  
> 
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