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George Cook wrote:
Zhigao:
Exactly, the mismatch problem turns out to be due to the mp4 file I
used. I
can successfully create a playlist using the sample movies (the movie
only
shows a rolling QuickTime logo, right?) and get it playing. I can
also do
multicast streaming with the relay running, though no connected relay is
shown in the web admin page (DSS bug?).
You won't see connected users to a multicast. The streaming server
sends packets to the multicast address, and clients tune in on the
multicast in progress. There is no way for the streaming server to
know who's tuned in. All clients are tuning in on the same packet
stream with multicast. With unicast each client makes a separate
connection to the server, so it can track concurrent users.
I realize clients do not need to connect to the DSS unless they use RTSP
to access the sdp file. I was actually talking about "connected relay".
Although the unicast2multicast relay is using loopback address, I think
by right it should be shown at the web admin.
I downloaded the Towers.mp4 file from a movie website at http://www.archive.org/movies/movies.php. I can stream this video
using the
gmp4player of the MPEG4IP (I use this player because QuickTime 6 does
not
have a Linux version), but it seems DSS is not happy with it. I guess
the
video is lack of hint info required by DSS. If you happen to know how
to add
the hint, please let me know.
That's good to know. There have been some threads on the list on using
open source tools to compress/hint mpeg-4. I'm not an expert in this
area. With QuickTime Player and a QuickTime Pro license you could
export "Movie to MPEG-4", set the video and audio tracks to "pass
through" and add a hint track. Or you could "Export Movie to Hinted
Movie" which will create a QuickTime .mov file with the mpeg-4 a/v
tracks and a QuickTime hint track.
I am a rookie to MPEG4. FYI, I use the mp4info utitily to retrieve the
infor of the Towers.mp4 and the sample files and it says
Towers.mp4:
Track Type Info
1 video MPEG-4 Simple @ L1, 715.414 secs, 257 kbps, 320x240 @
29.97 fps
2 hint Payload MP4V-ES for track 1
5 audio MPEG-4 AAC LC, 714.988 secs, 64 kbps, 22050 Hz
6 hint Payload mpeg4-generic for track 5
7 od Object Descriptors
8 scene BIFS
sample_100kbit.mp4:
Track Type Info
1 audio MPEG-4 AAC LC, 70.031 secs, 28 kbps, 22050 Hz
2 video MPEG-4 Simple @ L3, 70.000 secs, 63 kbps, 192x240 @
15.00 fps
3 hint Payload MP4V-ES for track 2
4 hint Payload mpeg4-generic for track 1
5 scene BIFS
6 od Object Descriptors
