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Hi Borja,<br>
<br>
I don't like the "mp4a" on the atom name, but as the MP4AddAudioTrack
creates automatically the rest of the atoms inside mp4a.. uuf.. I think
that it's the quickest way to solve it.<br>
<br>
Perhaps the best way should be rewritting theMP4AddAudioTrack removing
the "mp4a" references and creating everythin under "alaw" or "ulaw"
and also setting the 4th property of the sound atom ("channels") to the
correct value.<br>
<br>
Best regards<br>
Sergio<br>
<br>
<br>
Borja SIXTO escribió:
<blockquote cite="mid:48F48757.9040302@i6net.com" type="cite">
<pre wrap="">Hi Sergio,
I have found a partial work around by adding some track information (for
the alaw is the same) :
/* Create audio track */
audio = MP4AddAudioTrack(mp4, 8000, 0,
MP4_ULAW_AUDIO_TYPE);
MP4SetTrackIntegerProperty(mp4, audio,
"mdia.minf.stbl.stsd.mp4a.channels", 1);
MP4SetTrackIntegerProperty(mp4, audio,
"mdia.minf.stbl.stsd.mp4a.sampleSize", 8);
/* Create audio hint track */
hintAudio = MP4AddHintTrack(mp4, audio);
/* Set payload type for hint track */
type = 0;
audio_payload = 0;
MP4SetHintTrackRtpPayload(mp4, hintAudio, "PCMU",
&type, 0, NULL, 1, 0);
But you need to set -acodec pcm_mulaw before the -i ffmpeg option.
Just an other pending modification.
We can add some informations in the recorded file like that (I am adding
this modification) :
#ifndef i6net
MP4SetMetadataTool(mp4, "app_mp4");
MP4SetMetadataWriter(mp4,"Called service");
MP4SetMetadataArtist(mp4,"Caller");
MP4SetMetadataAlbum(mp4,"Album");
MP4SetMetadataName(mp4,"13/10 13h40");
MP4SetMetadataYear(mp4,"2008");
#endif
Regards,
Borja
Sergio Garcia Murillo a écrit :
</pre>
<blockquote type="cite">
<pre wrap="">That's the problem:
Stream #0.0(eng): Audio: pcm_mulaw, 8000 Hz, *_stereo, 128 kb/s_*
I'll check if we set it wrong to stereo or it's ffmpeg the one that's
it's decoding it worng.
BR
Sergio
Silvio Sisto escribió:
</pre>
<blockquote type="cite">
<pre wrap="">I was able to stream some video from x-lite to asterisk and save it
using the mp4save application. Codecs used were g711 and h263.
When I tried to convert the file to other formats using ffmpeg, the
audio track had it's length reduced to a half. Sounds kinda like
squirrels talking :)
It seems that ffmpeg thinks the original file's audio track has 128
kbps instead of 64 (as mp4info correctly recognizes it). I'm guessing
ffmpeg doesn't support g711. Upon further investigation it seems that
none of x-lite's codecs are supported by ffmpeg.
Is there a way to make asterisk convert the audio stream to anther
codec before mp4_save records it?
Thanks,
Silvio Sisto
This is the content of the original (mp4save) file according to mp4info:
----------------------------------------------------------
mp4info version 1.5.0.1 <a class="moz-txt-link-rfc2396E" href="http://1.5.0.1"><http://1.5.0.1></a>
test2.mp4:
Track Type Info
1 audio G.711 uLaw, 11.120 secs, 64 kbps, 8000 Hz
2 hint Payload PCMU for track 1
3 video Unknown, 10.856 secs, 0 kbps, 0x0 @ 11.33 fps
4 hint Payload H263 for track 3
mp4info: symbol lookup error: mp4info: undefined symbol:
MP4GetMetadataGrouping
----------------------------------------------------------
# ffmpeg -i test2.mp4 -f flv video2.flv
OUTPUT:
----------------------------------------------------------
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2004 Fabrice Bellard
configuration: --enable-gpl --enable-pp --enable-mp3lame
--enable-faac --enable-faad --enable-amr_nb --enable-amr_wb
--enable-shared
libavutil version: 49.0.0
libavcodec version: 51.11.0
libavformat version: 50.5.0
built on Oct 10 2008 16:54:46, gcc: 4.1.2 20061115 (prerelease)
(Debian 4.1.1-21)
Seems that stream 2 comes from film source: 1000.00 (90000/90) ->
19.00 (19/1)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test2.mp4':
Duration: 00:00:11.1, start: 0.000000, bitrate: 92 kb/s
Stream #0.0(eng): Audio: pcm_mulaw, 8000 Hz, stereo, 128 kb/s
Stream #0.1(eng): Data: rtp / 0x20707472
Stream #0.2(eng): Video: h263, yuv420p, 176x144, 19.00 fps(r)
Stream #0.3(eng): Data: rtp / 0x20707472
Output #0, flv, to 'video2.flv':
Stream #0.0: Video: flv, yuv420p, 176x144, q=2-31, 200 kb/s, 19.00
fps(c)
Stream #0.1: Audio: mp3, 8000 Hz, stereo, 64 kb/s
Stream mapping:
Stream #0.2 -> #0.0
Stream #0.0 -> #0.1
Press [q] to stop encoding
[h263 @ 0xb7e00468]warning: first frame is no keyframe
[mp3 @ 0xb7e00468]lame: output buffer too small (buffer index: 321,
free bytes: 1983)
frame= 206 q=2.0 Lsize= 87kB time=5.4 bitrate= 131.4kbits/s
video:30kB audio:42kB global headers:0kB muxing overhead 20.380929%
----------------------------------------------------------
------------------------------------------------------------------------
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