[Asterisk-video] h324m status

Thomas Frieling thomas.frieling at viif.de
Thu Aug 9 06:28:54 CDT 2007


Hi Klaus, hi Sergio!

We are currently working on the same problem:
- mp4save with a softclient (X-Lite) works
- mp4save/h324m_gw with a 3G-handset breaks the video

As I see it there are two possible reasons for it:
1. mp4save can handle H263-1998 (X-Lite), but breaks H263-2000 (handset) videos
2. as Klaus suggested: h324m_gw is broken (maybe h324m->ast_video_frames conversion or so)

Am I missing anything? Did you find out anything else?

---
In the broken videos you can only see the upper ~1/10 part of the picture, which runs too fast because the video framerate and duration is not correct: The duration of the mp4file and the audio track is ~16 seconds, whereas the video track is only ~5 seconds long.

$ mp4info recorded_video.mp4.new
mp4info version 1.5.0.1
recorded_video.mp4.new:
Track	Type	Info
1	audio	AMR, 16.940 secs, 12 kbps, 8000 Hz
2	hint	Payload AMR for track 1
3	video	H.263, 5.644 secs, 115 kbps, 176x144 @ 35.435861 fps
4	hint	Payload H263-1998 for track 3

$ MediaInfo recorded_video.mp4.new
General #0
Complete name        : /home/thomas/recorded_video.mp4.new
Format               : MPEG-4
Format/Info          : ISO 14496-1 version 2
Format/Family        : MPEG-4
File size            : 228 KiB
PlayTime             : 16s 940ms
Bit rate             : 110 Kbps
StreamSize           : 123 KiB
Encoded date         : UTC 2007-08-09 13:13:28
Tagged date          : UTC 2007-08-09 13:13:51

Video #0
Codec                : H.263
Codec/Info           : H.263 (3GPP)
PlayTime             : 5s 644ms
Bit rate             : 115 Kbps
Width                : 176 pixels
Height               : 144 pixels
Aspect ratio         : 1.222
StreamSize           : 79.5 KiB
Encoded date         : UTC 2007-08-09 13:13:33
Tagged date          : UTC 2007-08-09 13:13:51

Audio #0
Codec                : AMR-NB
Codec/Info           : AMR narrow band (3GPP)
PlayTime             : 16s 940ms
Bit rate             : 12 Kbps
Channel(s)           : 2 channels
Sampling rate        : 8000 Hz
Resolution           : 16 bits
StreamSize           : 25.6 KiB
Encoded date         : UTC 2007-08-09 13:13:33
Tagged date          : UTC 2007-08-09 13:13:50


---

I consider this bug pretty much as a show stopper and I think that we should fix this issue as soon as possible.


Thanks,
Thomas

PS at Sergio: do you still need an example video?
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