#1  
Old 17th June 2011, 21:30
Transgenic Transgenic is offline
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Exclamation Video is blocky in 20.2

I've been testing out 20.2 and it seems that the settings for the encoder were changed. I wish we had access to those settings... but oh well. Anyway, the videos that are being output now are significantly more blocky when the whole image is moving (such as playing a first-person shooter when you walk around and look in different directions). I've had someone explain this setting before back when I was doing Xvid encoding, but I don't remember what it is called off the top of my head.

What it does is optimize the still images (meaning the less the scene moves, the clearer it becomes). The problem is if the scene is constantly moving (such as a first-person shooter), it looks like a garbled mess of blocks. This is unlike how it was in the previous version of Procaster. All video (moving or not) was treated equally, so it mainly relied on the bit-rate to determine the quality.

No matter how high I set the bit-rate in this version, though, it seems it always ends up being significantly more blocky than the videos from the older version. I have example videos if you need me to upload them somewhere, but I'm sure someone who deals with video encoding would know exactly what I'm talking about.

I would like to be able to disable this "Optimize Still Images" feature so the video quality is the same as it was in the previous version of Procaster.

I've attached 2 images: 1 from the previous version of Procaster and one from version 20.2. Both videos were captured with the same settings in Procaster.
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  #2  
Old 18th June 2011, 08:11
RonaldH RonaldH is offline
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Hello, I see it is indeed way worse, could we have some extra information about this?

What we would like to know is:
-What resolution and bitrate settings are you testing this with
-And what version was the previous version, was it the last beta or last stable, please give us a version number.

Thanks
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  #3  
Old 18th June 2011, 19:16
Transgenic Transgenic is offline
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The last version I was using was 20.0.151.0

Here is the MediaInfo of each of the recordings:
Old (20.0.151.0) Recording:
General
Complete name : H:\Vids\Captures\Procaster-20110615-164703.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 35.4 MiB
Duration : 10mn 51s
Overall bit rate : 456 Kbps
Encoded date : UTC 2017-04-19 11:23:57
Tagged date : UTC 2017-04-19 11:23:57

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 10mn 51s
Bit rate mode : Variable
Bit rate : 354 Kbps
Width : 768 pixels
Height : 480 pixels
Display aspect ratio : 1.600
Frame rate mode : Variable
Frame rate : 26.987 fps
Original frame rate : 30.000 fps
Minimum frame rate : 0.948 fps
Maximum frame rate : 1 000.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.036
Stream size : 27.5 MiB (78%)
Language : English
Encoded date : UTC 2017-04-19 11:23:57
Tagged date : UTC 2017-04-19 11:23:57

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 14s 764ms
Bit rate mode : Variable
Bit rate : 4 234 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Stream size : 7.45 MiB (21%)
Language : English
Encoded date : UTC 2017-04-19 11:23:57
Tagged date : UTC 2017-04-19 11:23:57

New (20.2.0) Recording:
General
Complete name : H:\Vids\Captures\Livestream Procaster-20110617-205218_546.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 15.8 MiB
Duration : 4mn 21s
Overall bit rate : 507 Kbps
Encoded date : UTC 2011-06-17 19:52:19
Tagged date : UTC 2011-06-17 19:52:19

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.2
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 4mn 21s
Bit rate mode : Variable
Bit rate : 406 Kbps
Width : 848 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.033
Stream size : 12.6 MiB (80%)
Title : Procaster Video
Language : English
Encoded date : UTC 2011-06-17 19:52:19
Tagged date : UTC 2011-06-17 19:52:19

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 4mn 21s
Bit rate mode : Variable
Bit rate : 96.0 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Stream size : 3.01 MiB (19%)
Title : Procaster Audio
Language : English
Encoded date : UTC 2011-06-17 19:52:19
Tagged date : UTC 2011-06-17 19:52:19

Also, I attached a screenshot of the settings in Procaster itself from the new version (20.2.0). The settings were identical in the old version (20.0.151.0) except you changed "Keyframe" from "seconds" to "frames." I was using 2 seconds previously, which would be equivalent to the 60 frames I have it set to now, recording at 30 frames a second.

Edit: I accidently put an extra ".0" in the name of the screenshot.
Attached Images
File Type: png Procaster.20.0.2.0.Settings.png (42.4 KB, 7 views)

Last edited by Transgenic; 18th June 2011 at 19:19.
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  #4  
Old 18th June 2011, 19:31
RonaldH RonaldH is offline
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We will investigate this on monday, thanks for your extended information.
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  #5  
Old 19th June 2011, 16:55
superthrust superthrust is offline
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I am having this exact same issue myself, and i was about to investigate my settings...Ill make some changes and see if that does anything, but i've never had this issue.

Right now the only thing i can make a comparison to is when i capture video from FRAPS, then use Windows Movie Maker or some other video editing program to edit/create video, and it will look terrible in the preview, but much better in the finished product...this lacks finished product.
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  #6  
Old 20th June 2011, 16:02
RonaldH RonaldH is offline
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We can confirm that it is indeed more blocky than version 20.0.151 but this is because this version keeps itself more to the set bitrate, with the old version, it could spike a lot, and cause the connection to drop. With the new version, with the same encoder settings as in version 20.0.151 it gets a higher quality image.

If there is enough interest in it, we might add an feature where you could allow high spikes in bandwidth.

So please reply in this topic if you want to have this feature.
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  #7  
Old 21st June 2011, 16:49
Transgenic Transgenic is offline
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Quote:
Originally Posted by RonaldH View Post
We can confirm that it is indeed more blocky than version 20.0.151 but this is because this version keeps itself more to the set bitrate, with the old version, it could spike a lot, and cause the connection to drop. With the new version, with the same encoder settings as in version 20.0.151 it gets a higher quality image.

If there is enough interest in it, we might add an feature where you could allow high spikes in bandwidth.

So please reply in this topic if you want to have this feature.
So, you are saying there is a sacrifice in quality as to maintain bitrate. I see. I have had those 'spikes' happen before. My viewers say that the video stops every once and a while, even though it wouldn't stop for me.

However, I think it is worth it to be able to have stable video quality over connection. I'd rather have people drop for a few seconds every so often, than have my quality suffer because of it. Also, the "On Demand" videos would also maintain better quality, so if a user missed a portion due to the 'spikes', then they can rewatch it later.

For now, I have reverted back to 20.0.151. I also tested 20.1.202 and 20.1.242, but those had issues of their own.

I'm sure that adding an option as such would be useful beside the Bitrate Edit Box:
[Checkbox] Variable Bitrate [with the mouse hover text] = "Allow for variability in the bitrate (may cause connection spiking)"

Thank you! :-)
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