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MediaPortal 2
General
(Micro)Stutter when playing TV
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<blockquote data-quote="Lehmden" data-source="post: 1249496" data-attributes="member: 109222"><p>Hi.</p><p></p><p>If you have a look into the timeshift folder while you (or someone else) are watching LiveTV you will see a bunch of .ts video files. Name and number depends on your current system but did not matter in this case. If you now copy one of those .ts videos over to another place (don't stop watching live TV while copying as if you do so the files will be deleted instantly) it is a completely "normal" video file. The Server only is playing this temporary but normal video exactly as every other video file and send it to the client like it does with every other video too.</p><p></p><p>But Timeshifting is very timing sensitive. The video must be grabbed from antenna, remuxed to contain the wanted streams, written to the timeshift folder by the TV Engine (more or less independently from the server) and read by the server for playback at the same time. And this has to be done for every client watching Live TV at the same time... </p><p>For this the physical disk used for Timeshifting is important. Worst case is if it is the same disk than the OS is installed as Windows constantly is reading and writing on this disk. Best case is a RAM Disk... I always had issues with stuttering Live TV until I changed over to a "dynamic" RAM disk (IMDisk Toolkit)... Ever since then all stutter disappears... So most likely the stutter has it's root cause here... </p><p></p><p>It's similar as if 4 or 5 or even more tasks are trying to play different videos from the same disk at the same time. Maybe you can imagine that it is a bit sensitive...</p></blockquote><p></p>
[QUOTE="Lehmden, post: 1249496, member: 109222"] Hi. If you have a look into the timeshift folder while you (or someone else) are watching LiveTV you will see a bunch of .ts video files. Name and number depends on your current system but did not matter in this case. If you now copy one of those .ts videos over to another place (don't stop watching live TV while copying as if you do so the files will be deleted instantly) it is a completely "normal" video file. The Server only is playing this temporary but normal video exactly as every other video file and send it to the client like it does with every other video too. But Timeshifting is very timing sensitive. The video must be grabbed from antenna, remuxed to contain the wanted streams, written to the timeshift folder by the TV Engine (more or less independently from the server) and read by the server for playback at the same time. And this has to be done for every client watching Live TV at the same time... For this the physical disk used for Timeshifting is important. Worst case is if it is the same disk than the OS is installed as Windows constantly is reading and writing on this disk. Best case is a RAM Disk... I always had issues with stuttering Live TV until I changed over to a "dynamic" RAM disk (IMDisk Toolkit)... Ever since then all stutter disappears... So most likely the stutter has it's root cause here... It's similar as if 4 or 5 or even more tasks are trying to play different videos from the same disk at the same time. Maybe you can imagine that it is a bit sensitive... [/QUOTE]
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(Micro)Stutter when playing TV
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