Hi Dan, Thanks alot for your very clear and concise explanation. It will help us all so much as we do our tests. Also, it will now be much easier to help out with patches where I can manage to understand the red5 streaming issues; it is very hard!
Thanks once again. On 3/21/07, Dan Rossi <[EMAIL PROTECTED]> wrote:
Hi, > Hi Dan, > > You have been testing live streaming much longer than most of us so if > I get > you right, red5 has had the following issues for live streaming: Im not sure about longer my very first post here was july last year ?? :) > > 1. Heap space errors for large files. This is because of mina. Sorry i think I got you confused, there was java memory heap errors with red5 last november for videos larger than 46MB to be exact. This was fixed. The mina issue i mentioned about was suggested to me here http://jira.red5.org/browse/SN-1 Ive logged every single comparison test i can do here, it was painful and time consuming :\ the problem with vod buffering problems which red5 seems to have an issue with latency and is unable to handle the video data to "push" more bits down the connection to keep the buffer length in check which seems both FMS and wowza seem to do. So if you are a few k's from your server in a data centre you are fine and buffer lengths of 1 minute, if you are inter-continental across underwater cabling like I am then the problems start to arise i think. Well we've had issues with people broadcasting from brazil to our DC in NY, and from Sydney to NY. Its that bad we've had to move the short clips back to progressive download as i did in november, however we added scrub features into our player so was just a test to see how stable red5 is with it. So in terms of memory and resources stability is perfect maybe a little more cpu than i like (P4 3G 2G of ram) about 20% usage so far compared to IIS with the same traffic its pretty much 0% :) > 2. Buffering issues. What do you think is causing buffering problems? See above. > 3. Live delay. Audio/Video is out of sync? What do you think is > causing this > for live streaming? Well from the previous comments live delay shows up as 0 , i get the negative timestamp warnings, its streaming at 150k so no problem with buffering however a 180k vod still has ther same buffer problem on a 24MB adsl conn so its not that ! We've teried every config pososible it seems streaming at 80 video quality seems to make the frames stick less, streaming at 30fps seems to give alot of headroom to accomodate on playback so red5 is doing between 9 and 16fps so thats ok. The issue lots of us are experiencing as with my case is it will play the frames smooth for 3 seconds, stick, play frames smooth for another 3-5 seconds stick and over and over. Im just so hoping its related the the vod problem so if thats fixed so is the live issue. Back to the comparison, red5 streamed live better than fms which caused rebuffering, maybe its because of the bandwidth limits set but i got no error about it. Wowza rebuffered also on live streaming, but both wowza and fms was perfect with vod so cancels out bad route issues to servers. > > What other issues might you be having? I seem to be hitting the same > issues > you speak about. For example, when I begin loading files over 300MB, it > sometimes fails to play. the only issue i have is on first load the buffer of 8 seconds is empty again so rebuffers and then when it goes to play it starts at 8 seconds not 0 seconds ! No major issue with 300MB files. _______________________________________________ Red5 mailing list [email protected] http://osflash.org/mailman/listinfo/red5_osflash.org
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