Encoding Times (G5)

[Scorpio1974]

Hi all, my first post!

Been using ffmpegx recently to author a few AVI's to DVD using the preset codec...all works brilliantly with no issues whatsoever (registration coming major!!)....

I was just wondering what kind of encoding times users are getting when encoding approx 2 hours of video using ffmpegx? On a single processor 1.8ghz G5 with 2gb RAM its taking a little under 9 hours from beginning to end (which I'm more than happy with). I've noticed when I use Toast to encode a disk image it only takes 5 hours maximum to encode 2 hours of video. The quality between the two applications seems to be negligble, and although Toast seems to hog more resources than ffmpegx, I was wondering why Toast is by far faster than anything else I've used for encoding.??

Any dual 2.5ghz users out there??! Thanks in advance,

J

[major]

It depends from the engine and codec, source format, and encoding settings.

For AVI to VOB, the DVD mpeg2enc engine is up to 2 times slower than Toast "standard quality" (for 1 or 2 processors).

However, the situation is reversed with DVD ffmpeg engine with 'Decode with Quicktime' disabled, which is 2 times faster than Toast (2.6 times faster with dual processor).

I'm going to publish some benchmarks on the ffmpegX site.

[Scorpio1974]

Thanks for that Major,

the reason I'm not using the ffmpeg engine to encode to DVD is that the files I'm trying to convert are Divx (Mpeg 4) with AC3 sound and NTSC Framerate, and when I try to convert (with 'Decode with Quicktime' UNchecked, the file whizzes through but does not give me any output files... What gives? If I check the quicktime box, the process fails when it tries to encode the Mpeg4 AAC audio file to dolby digital....

I've searched the posts but can't find any examples of this happening... I'd really like to use the ffmpeg engine if its that much faster but I can't seem to get it working.....

More thanks in advance...

[sdm]

However, the situation is reversed with DVD ffmpeg engine with 'Decode with Quicktime' disabled, which is 2 times faster than Toast

Major, I always have used the 'decode with quicktime' because I've gotten the impression (from reading forum posts) that if I decode with the ffmpeg engine I will lose audio sync.
Is this true?
However, I always author in dvd studio pro, so I only use elementary streams. Would it be okay to decode with ffmpeg (and encode with it too) since I am not interested in the muxed file anyhow?

Thanks
--sdm

[major]

, the file whizzes through but does not give me any output files... What gives?

You should post the process output to understand about the cause.