adding AC3 track

[Mothman666]

hello everyone.. last night i removed the audio track MPEG - 1 Layer 3 MP3 from Braveheart DVDRip which was of 2 CDs using virutaldub modaud and added AC3 5.1 audio track which was extracted from another DVD i did this because the DVD was of bad quality and the 2CDs were of high quality... here is the trouble usually 2CDs when clubbed gives 1.36GB file but after adding AC3 audio track the size of the file 1.75GB without having any other audio track.... could anyone please tell me wherever i'm doing mistake? any help is really appreciated...

[manono]

Hi-

The MP3 track you removed was compressed from the original AC3, and the audio was made much smaller. Maybe the original AC3 had a bitrate of 448, and the recompressed MP3 was at 160. Just an example. You can check the orignal AVI in GSpot to find the information for the MP3 audio. When you removed it and replaced it with the much larger original AC3 track, then the AVI size grew by a lot. Now, if you want to keep it the way it is, you can either split it into 3 CDs, or maybe burn it to DVDR.

[Mothman666]

oh thank you so much manono and will i get 1.36GB if i compress the AC3 track to the same original MP3 bitrates??

[guns1inger]

Or go an buy the special edition that the CDs were created from

[Mothman666]

hehe and one more thing i checked rest of the AC3 2CDs movies i have all are 448kbps bitrate while MP3 are 128kbps... i guess compressing the AC3 bitrate won't help?!

[manono]

Hi-

hehe and one more thing i checked rest of the AC3 2CDs movies i have all are 448kbps bitrate while MP3 are 128kbps... i guess compressing the AC3 bitrate won't help?!

If you take the AC3 and compress it to MP3 with the same bitrate as the original AVIs with MP3 audio, then, yes, you'll end up with the same size as the original AVIs. No, it won't help if you want smaller AVIs.