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For the pros: Different length in audio- and file of the same stream

 (http://stream-recorder.com/forum/showthread.php?t=11279)

svnpenn 04-15-2012 11:32 AM

Re: For the pros: Different length in audio- and file of the same stream


 
Ok this is what I did

PAGE
be-at.tv/brands/wmc/surfcomber/waveform-with-victor-calderone-guests/ida-engberg

GET AUDIO
Code:
rtmpdump \
-r rtmp://media.cdn.be-at.tv \
-a cfx/st \
-W http://www.be-at.tv/v2/2/7/HostMovie.swf \
-y Session001216/Audio001284/128 \
-o Audio001284.flv
GET VIDEO
DownThemAll, Batch Download
Code:
video.cdn.be-at.tv/Session001216/Video002677/1000.[000:100].flv
MERGE
Merge videos with Avidemux, then combine with audio
Code:
ffmpeg -i 1000.000-100.flv -i Audio001284.flv -c copy video-audio.flv

sebastian 04-22-2012 09:31 AM

Re: For the pros: Different length in audio- and file of the same stream


 
Thanks a lot guys, am going to try this!

sebastian 06-05-2012 12:54 PM

Re: For the pros: Different length in audio- and file of the same stream


 
One other question: How can I append multiple files in AviDemux? Append 100 files one after one is very difficult. ;-)

svnpenn 06-05-2012 11:13 PM

Re: For the pros: Different length in audio- and file of the same stream


 
Quote:
Originally Posted by sebastian (Post 47165)
One other question: How can I append multiple files in AviDemux? Append 100 files one after one is very difficult. ;-)
Just highlight all of them and drag to the program; thats what I did.

sebastian 06-06-2012 10:12 AM

Re: For the pros: Different length in audio- and file of the same stream


 
That works, thanks! And I can be sure, that AviDemux will add it in the right order (alphabetically)?

svnpenn 06-06-2012 12:58 PM

Re: For the pros: Different length in audio- and file of the same stream


 
Quote:
Originally Posted by sebastian (Post 47207)
That works, thanks! And I can be sure, that AviDemux will add it in the right order (alphabetically)?
Should do :)

sebastian 06-07-2012 10:02 AM

Re: For the pros: Different length in audio- and file of the same stream


 
Okay I see the problem of be-at.tv now:

The videostream is missing frames every now and then. So if I use a constant frame rate, the video will always be shorter than the audiostream. I figured it out when I saw, that sometimes my downloaded video is getting slower and faster.

When watching the video via the website, the video get's resynced to the audio every few seconds.

So, right now it's turning out into the pro-question ;) : How can I merge the video-chunks AND have it synced to the audio?

sebastian 06-08-2012 05:42 AM

Re: For the pros: Different length in audio- and file of the same stream


 
Alternatively, is there a way to stretch the video via its framerate, so that it fits the audio length?

sebastian 06-08-2012 01:35 PM

Re: For the pros: Different length in audio- and file of the same stream


 
My 2nd question is answered with the following string, which syncs the video to the audiostream:

Code:
ffmpeg -i video.flv -vsync drop -i audio.flv -c copy video-audio.flv -map 1:1
If anyone does have a better solution, please help me. :-)


EDIT: That didn't help. It only changed the length of the videoindex, not the framerate. :-(


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