Huge DVD file after conversion

[welz400]

Hi,
I converted an avi file to an svcd mpg file, which finished up at 1.6Gb. This is too big to burn onto 2 CDR's, so I thought I would convert it to a DVD file, using TMPGenc. But after doing so the file is now just over 4Gb in size.
Is this normal?
I have never burnt a DVD yet.

Thanks

[mujahid7ia]

tell us what specs u used for the encoding, and di u encode from SVCDMPEG2>DVD??

more info needed!!

[ZippyP.]

Is this normal?

Knowing absolutely nothing about your conversion method, programs used, any guides you may have followed, length or any other information about your file .......My answer to your question is YES! (Maybe )

[welz400]

The media file started out as a 700mb avi file, to which I used TMPGenc to convert to a PAL 4:3 svcdmepg2 file. That converted to a 1.6Gb file.

That is all I did, nothing else.

Thanks

[ZippyP.]

Did you use the wizard in TMPGEnc? How long is the file in minutes? What bitrate did you use for audio and video? What format is the audio in your avi? Is it MP3, AC3 or ? Did you strip the audio to wav first? Scanned for bad frames?

The size of the avi is not relevant to your mpeg size, only the length in minutes and the bitrate that you used to encode

[welz400]

Yes I used the wizard in TMPGenc to convert the avi file to svcdmpeg2
The running time of the file is 1 hour 24 mins approx.

The following information is taken or given by AVICodec:
File: 700 MB (700 MB), duration: 1:24:14, type: AVI, 1 audio stream(s), quality: 56 %

Video: 613 MB, 1018 Kbps, 23.976 fps, 640*272 (2.21:1), XVID = XVID Mpeg-4, Supported

Audio: 86 MB, 144 Kbps, 48000 Hz, 2 channels, 0x55 = MPEG Layer-3, Supported

When I used the wizard I just let it use the default settings for what I wanted. In other words, I did not change/set the bitrate.
I did not scan for bad frames, neither did I strip the audio to wav first.

Hope that is enough information.
Thanks

[welz400]

Hope that is enough information

No I don't think it is, so here is some more for the mpeg2 file. Converted from the avi file as above.

File: 1.64 GB (1.62 GB), duration: 1:24:14, type: MPG, 1 audio stream(s), quality: 80 %

Video: 1.49 GB, 2520 Kbps, 25.0 fps, 480*576 (16:9), MPG2 = MPEG 2 (SVCD/DVD), Supported

Audio: 134 MB, 224 Kbps, 44100 Hz, 2 channels, 0x51 = Mpeg-1 audio Layer 2 [0xc0], Supported

Also I have just scanned for bad frames with Virtualdub, but none are found.

Thanks

[RabidDog]

filesize = minutes times avg bitrate
eg 10 minutes @ 2000 avg equals xxx
ergo et sum 104 times xxx = 1600mb
revising this to become xxx= 1600mb/104 = 2550kbs! suspiciously close to a CBR svcd bitrate
svcd=mpeg2
vcd-mpeg1 very different beasts.

[SIRCOOKS]

let me give you a simpler answer....everytime i have encoded to dvd, i have got the resulting 4gb file size, so yes it is normal...no matter what encoder you use, i get the same results with tmpgenc and main concept mpeg encoder

[ZippyP.]

filesize = minutes times avg bitrate

Exactly right. Average bitrate includes both audio and video bitrate. If you want to check if the file size is correct then you can use a bitrate calculator, there's one in the Tools section. Your file size is about right as you encoded at the maximum audio and video bitrates for SVCD.

Bitrate can be adjusted to make smaller files but quality can start to suffer if you go too low. The type of video affects how much bitrate is required to keep it looking good. Video capture (noisy) and high action video needs higher rates. VBR encoding is a great way to preserve quality while reducing file size. 2-pass VBR allocates higher bitrate where it's needed and saves bits from low action scenes where it isn't needed. It can take twice as long because of the 2 passes required. In VBR it's the average bitrate which determines file size.

BTW, in the 4th screen of the wizard you set the bitrate and adjust the file size.

[MOVIEGEEK]

This question is asked several times a week.The reason is that Divx uses VBR MP3 audio and this confuses TMPGEnc,convert the audio to WAV then load the WAV in Audio Source and the AVI in Video Source.

[welz400]

Hi, and thanks to all for replies and help.

The stream error message I got was exactly as I was told, in that it was not enough space on my HD to burn to, so I sorted that out.

Eventually I converted to a DVD PAL file using TMPGenc, but I am going to start a new thread for that one.

Thanks again