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Video streaming issues
Posted:
Tue Feb 15, 2011 2:44 amby tanza
Hello
I am having issues streaming video in Subsonic from my vortex box server. The video streams OK but the problem I am having is...
4:3 video streams fine with default trans-coding if fact it looks great, but when a video is 16:9 or wider the streaming becomes pixelated, blocky and pretty much unwatchable.
The video format is .m4v (encoded using handbrake). All video files play fine in WMP and VLC locally on the PC. It is just when playing wide format video in the JW player that things get wacky.
Any help or suggestions would be greatly appreciated. Thanks.
Posted:
Tue Feb 15, 2011 10:20 pmby tanza
Anybody?
It only gets pixelated when it is "widescreen" video transcoded to FLV. I have scoured the forum for a couple of weeks and can't seem to find any information about this issue.
Again, any help would be greatly appreciated.
Posted:
Wed Feb 16, 2011 6:35 amby GJ51
What is your transcoding string?
Posted:
Wed Feb 16, 2011 3:47 pmby tanza
I haven't changed it so it is the default:
ffmpeg -ss %o -i %s -async 1 -b %bk -s %wx%h -ar 44100 -ac 2 -v 0 -f flv -
Thanks for replying.
Posted:
Wed Feb 16, 2011 4:58 pmby GJ51
Give this a try:
ffmpeg -v 0 -ss %o -async 30 -i %s -f flv -b %bk -r 23.976 -s %wx%h -ar 44100 -ac 2 -
Posted:
Wed Feb 16, 2011 7:24 pmby tanza
Wow!! It looks great now.
If you don't mind... I see that the string is different but what was causing the issue?
I want to thank you very much for taking your time to help me. I am very grateful.
Posted:
Wed Feb 16, 2011 8:06 pmby GJ51
Good question. I honestly don't know. Transcoding is not my area of expertise, but I'm just smart enough to recognize that Stozher is the expert in this area and listen to his advice. This string is what he gave me, the credit goes to him.
Posted:
Wed Feb 16, 2011 9:35 pmby tanza
Well, thank you Gary and Stozher!!!
Anthony
Posted:
Thu Feb 17, 2011 1:31 amby stozher
ffmpeg -v 0 -ss %o -async 23.976023976 -i %s -f flv -b %bk -r 23.976023976 -s %wx%h -ar 44100 -ac 2 -
ffmpeg -v 0 -ss %o -async 25 -i %s -f flv -b %bk -r 25 -s %wx%h -ar 44100 -ac 2 -
ffmpeg -v 0 -ss %o -async 29.97002997 -i %s -f flv -b %bk -r 29.97002997 -s %wx%h -ar 44100 -ac 2 -
... for 24, 25 and 30 fps... "-async 1" is a special case where only the start of the audio stream is corrected (synchronized to video stream) without any later correction.
ffmpeg -v 0 -ss %o -async 1 -i %s -f flv -b %bk -r 25 -s %wx%h -acodec copy -
PP:
http://en.wikipedia.org/wiki/24p