Stream Capture

Microsoft Windows specific usage questions
Forum rules
Please post only Windows specific questions in this forum category. If you don't know where to post, please read the different forums' rules. Thanks.
Just4Fun20
New Cone
New Cone
Posts: 3
Joined: 25 Jun 2007 23:38

Stream Capture

Postby Just4Fun20 » 25 Jun 2007 23:52

I'm just looking for a short answer to serve as a sanity check and also to push me in the right direction. I've just spent the last several hours trying to capture a video stream. Ultimately I'd like to make it into an MPEG-2 so that I can put it on a regularly playable DVD. It's a medical file and many people have been unable to view it.

I followed the URL's and ended up with an RTSP:// extension. The file requires Quicktime to be installed, so that must be the video format. I tried a half dozen "capture" programs but was most impressed with VLC. I've made the most progress using this program. I can easily view the streaming video using VLC. Using the Wizard I can even tell it to capture to a file and it does capture a file. However, regardless of leaving it alone or transcode options or the encapsulation options I can not get a viewable capture. The audio plays but no video, even with the VNC client. GSPOT detects the encapsulation and audio properly but nothing on the video codec.

The implication is that I can't capture Quicktime / RTSP streaming video. Has anyone succeeded with this? For starters I'd be happy to save and then replay with VNC. I don't see a lot in the way of additional codec's or modules that need to be added. Perhaps there's a combination of output transcoding and/or encapsulation that would work.

Thank you for any suggestions.

DJ
Cone Master
Cone Master
Posts: 8206
Joined: 01 Jan 2006 04:30
Location: Koloa, Hawaii USA

Re: Stream Capture

Postby DJ » 27 Jun 2007 08:41

From h.264 or MP4v to MPEG 2 you will need the fps=<framerate> option. Use the original framerate.

Just4Fun20
New Cone
New Cone
Posts: 3
Joined: 25 Jun 2007 23:38

Re: RTSP / QT Stream Capture Problems

Postby Just4Fun20 » 27 Jun 2007 17:26

Thank you for the suggestion. I've tried a dozen different combinations, still without success. I was unable to determine the "original" framerate so I assumed 29.97. I did this by adding the following to the "Stream Output MRL" "Target" line.
:sout=#transcode{vcodec=mp4v,vb=1024,scale=1}:duplicate{dst=std{access=file,mux=ps,fps-29.97,dst="C:\downloads\test.mov"}}
Whenever I "transcode" it creates a file, generally the audio will play but the video will not and GSPOT can't seem to identify the Video Codec (although it can detect the encapsulation).

I tried "Dump Raw Input". This causes an interesting problem. Normally I'm opening a "network stream" and then selecting the RTSP line. I plug in an address (RTSP://.../myfile.mov) and it plays the movie. When it transcodes the movie doesn't play, but I assume that is normal, since it is rendering to a file, not the display. When I select "Dump Raw Input" (on the Stream output screen, Output-File line) I get an error in the message screen basically saying it can't find the RTSP://.../myfile.cue file (note that this is a .cue file), then it fails with an error saying it couldn't find the .mov file. Here is the log file. I replaced the file (I used a find/replace on the path to be sure it was identical in each instance) path to make it more readable. Normally it's several hundred hexadecimal characters:
main debug: adding playlist item `rtsp://.../myfile0.mov' ( rtsp://.../myfile0.mov )
main debug: creating new input thread
main debug: waiting for thread completion
main debug: thread 4416 (input) created at priority 1 (input/input.c:265)
main debug: `rtsp://.../myfile0.mov' gives access `rtsp' demux `' path `.../myfile0.mov'
main debug: enforced demux ` dump'
main debug: creating access 'rtsp' path='.../myfile0.mov'
main debug: looking for access2 module: 5 candidates
main debug: net: connecting to a58.qt1vod.kamai.net port 554
main debug: connection in progress
access_realrtsp debug: rtsp connected
access_realrtsp warning: only real/helix rtsp servers supported for now
vcd debug: trying .cue file: .../myfile0.cue
vcd debug: could not find .cue file
access_file warning: .../myfile0.mov: No such file or directory
cdda debug: trying .cue file: .../myfile0.cue
cdda debug: could not find .cue file
cdda warning: could not open .../myfile0.mov
main warning: no access2 module matching "rtsp" could be loaded
main error: no suitable access module for `rtsp://.../myfile0.mov'
main debug: thread times: real 0m1.406250s, kernel 0m0.015625s, user 0m0.000000s
main debug: thread 4416 joined (input/input.c:412)
main: nothing to play
Thanks in advance for any help or advice (including, don't waste your time, it can't be done)


Return to “VLC media player for Windows Troubleshooting”

Who is online

Users browsing this forum: No registered users and 22 guests