WinTV-PVR-350. can set lower than 12Mbit?

[yoda21000]

I read that the WinTV-PVR-350 supports up to 12Mbit of tv recording, but if I'm recording a say a football game, that's 8 GB of video at 12Mbit. They said 12Mbit is 2 GB for every hour. So what setting that you guys are aware of that would keep it low enough that I can record to a DVD disc?

This is what I'd like to get since a Digital Recorder is kind of expensive and I don't want to pay a subscription fee just to get program updates.

[davideck]

I have a PVR-250 and the formula that works for me is;

Desired Bitrate in kbs = 549000 / length in minutes

For example, a two hour show, a length of 120 minutes, leads to a bitrate of 4575 kbs.

[FulciLives]

There is a bitrate calculator on this very website:

https://www.videohelp.com/calc

Just remember that the audio bitrate determines the size despite what format you are using. For instance an AC-3 audio file at 224kbps is the same size as a MP2 audio file at 224kbps.

PCM WAV audio is fixed at 1536kbps.

- John "FulciLives" Coleman

[SHS]

yoda21000 12Mbit is not 2GB per-hour that around 5.6GB per-hour.
FulciLives that bitrate calculator is not useful there no ture option for calculator setting on a custom video bitrate and peak video bitrate for VBR mode and frame size etc, etc.

[yoda21000]

12Mbit seems a bit overkill tho. Since a DVD is around 4-5 Mbit. I think it would best to set it to 2.5-3

[FulciLives]

yoda21000 12Mbit is not 2GB per-hour that around 5.6GB per-hour.
FulciLives that bitrate calculator is not useful there no ture option for calculator setting on a custom video bitrate and peak video bitrate for VBR mode and frame size etc, etc.

You make no sense my friend!

Running time determines the bitrate to use to get to a certain size.

peak video bitrate can be whatever you want and frame size means nothing.

352x240 at 5000kbps will take up the same amount of file size space as 720x480 at 5000kbps

- John "FulciLives" Coleman

[Nelson37]

John, I'm gonna disagree with your last point, to some extent.

The difference lies in Specified bitrate versus Actual bitrate. Yes, two files with an actual bitrate of 5000 bps will be the same size. BUT, when you encode two files and SPECIFY the desired bitrate from your encoder, many factors can cause the encoder to be closer to, or farther away from, the specified bitrate. One of those factors, at least for the ATI MMC, is most definitely framesize.

I have tested this many times with identical input. Cap and encode a 352x480 video, and same video at framesize 720x480, with the same bitrate settings, the 720 file came out significantly larger size.(10% or more larger). The same effect was observed with Tmpgenc and CCE, though the size difference was much less, usually negligible.(1% or less)

[SHS]

John man you are way off this only 5 min test from my WinTV-PVR 250 using SageTV Recorder and as you can see there is a diff I didn't do a full 2 hour or you would see major diff in files size.
Sorry but I can not capture 352x240 under MPEG2 only MPEG1
The screenshot was take from Womble MPEG2VCR MPEG File Information