Fix for constant rebuffering of video files

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Fix for constant rebuffering of video files

Postby dancinfool » Fri Aug 20, 2010 2:44 am

The problem: about ~an hour into any given movie, Roku starts rebuffering your video file ridiculously often, until it finally craps out.

The solution: modify your Handbake settings -- below is the configuration I've verified for my system at home. I'm _told_ 29.97 fps is all you need to do, but I haven't experimented with anything other than what's below. Hope this helps someone out there avoid a few headaches.

Video:
- H.264
- Large file support
- Enhance for web
- 1600 bitrate
- 29.97 fps

Audio:
- AAC Core Audio
- Stereo
- 48 khz
- 128 kbps audio
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Re: Fix for constant rebuffering of video files

Postby Jim » Thu Oct 07, 2010 9:11 am

jazric11 wrote:These are the different settings in handbrake that I have tried (my source is mkv 60 fps, 4000 bitrate, AC3 audio):

1. Large file size, web optimized, anamorphic strict, decomb (default), codec x264, 29.97 fps, 2500 avg bitrate, AAC audio 160 bitrate - picture fine when no fast motion, choppy picture very noticeable in fast action, no reload screen

2. Large file size, web optimized, anamorphic (strict or none), decomb (default), codec x264, same as source fps (60 fps), 4000 avg bitrate, AAC audio 160 bitrate - picture perfect, fast action flawless, gets a hiccup about 10 seconds into action and then does the reload screen, it repeats about 3 seconds of the action and then hiccups in the same place and does the reload screen again. Usually does this 3 x and then does a longer reload screen and the action continues.
jazric11

Ok, so I tried one more setting and I'm encouraged:

3. Large file size, web optimized, anamorphic none, decomb (default), codec x264, same as source fps (60 fps), 2500 avg bitrate, AAC audio 160 bitrate - picture is good quality, fast motion is perfect. I'm going to crank the bitrate up a little more to see how far I can go before it calfs.

I tested the above at 3000 avg bitrate and it hiccup'd. Here is my conclusion based on an mkv source file at 720p (1280X720), 60fps, 4000 bitrate, AC3 audio:


For High motion sports (Hockey, basketball, football?), use the following handbrake settings:

Output Settings
Container - MP4 File - Large file size - Web optimized

Picture
Anamorphic - None

Video Filters
Decomb - Default (may not be necessary but it can't hurt)

Video
Video Codec - H.264 (x264)
Framerate (FPS) - same as source
AVG Bitrate (kbps) - 2500

Audio
AAC codec automatic mixdown, auto samplerate - 160 bitrate

If the source is 1080 then I suppose a loose anamorphic setting and a reduction of the width from 1920 to 1280 would do it.
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Re: Fix for constant rebuffering of video files

Postby art » Mon Nov 01, 2010 6:15 pm

I get rebuffering after about 1hr plus. I tried the settings as stated but just dosen't help me. I just ended up splitting all movies into two files. Works perfect this way.
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Re: Fix for constant rebuffering of video files

Postby Jim » Tue Nov 02, 2010 11:16 am

Did you try just setting the frame rate to 29 ?
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Re: Fix for constant rebuffering of video files

Postby art » Sat Nov 20, 2010 12:17 am

Can't remember will try again
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Re: Fix for constant rebuffering of video files

Postby gjames » Sat Dec 18, 2010 11:09 pm

This is just a suggestion.

I am currently using Xilisoft Video Converter Standard. It is a pay software but because I have an NVIDIA video card with CUDA support this increases my RIP time by X5 compared to standard conversions.

I use the setting suggested here in HD H.264 and created a custom profile with just these settings.

Video:
Codec - H.264/MPEG-4 AVC
Video Size - 1280x720 for 720p or 1920x1080 for 1080p
Bitrate - 4000K
Frame Rate - 29.97
Level - 40
Zoom - Usually (Full (Keep aspect ratio)) unless the input is funky
Aspect Ratio - 16:9
both Check boxes unchecked

Audio:
Audio Codec - MPEG-4 AAC
Sample Rate - 48000
Bitrate - 128K
Channels - Stereo
Volume - 100%
Check box unchecked


It is really that simple. You can check to see if your card supports CUDA from Nvidia here: http://www.nvidia.com/object/cuda_gpus.html

You can try the software free but it only converts the first part of the video until you buy the full version.

NOTE: I am not endorsing this product nor do I sell it. I am just suggesting it as it works for me. And since it has a faster capability using CUDA technology it may help you also. This is not an advertisment.

I suggest that if others on here have had success with faster programs that they list thier experiences also as it may help others.

Thanks and did I mention that Chaneru is awesome. Thanks Jim for the software, keep up the great work.

UPDATE: I also found that DVDfab DVD Ripper does an amazing job going from DVD to H.264. Best quality conversion yet with the smallest file size.

There are some quirks like in all of these types of software but it's worth a look. I created some mp4's with bitrates below 2000kbps with DVDfab and they look better than many of the other converters at 3000 to 6000kbps.

Also DVDfab is using CUDA for H.264 conversions also which speeds things up dramaticaly.
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