Cut the video, Resize into smaller resolution, But keep the video bit rates

[morsh]

Hello there,
Okay I try both Virtualdub and Avidemux.

What I try to accomplished is, cutting some scene from full movie, then resize to smaller resolution for my galaxy pocket which is 240p. The original file is in 480p.

First I try with Virtualdub, using the resize filter and xvid compression. Result is I got the 240p resolutions. But the video bit rate way too low. From around 1000 kbits/sec down to around 300 kbits/sec. Which makes the video movement not quite smooth.

Second I try with Avidemux, using the resize filter. But my video ended up still in 480p resolutions. I think there's a bug in avidemux resize filter.

Is there any tricks, so I can cut the video, resize the resolutions from 480p to 240p and keep the video bit rates around the original 1000 kbits/sec to make the video play stay smooth.

Thanks in advanced :)

[sneaker_ger]

In VirtualDub do 2 passes with Xvid.
1.) "Twopass - 1st pass", (no audio needed), then queue the job
2.) "Twopass - 2nd pass", "target bitrate" to "1000", then queue the job and start the job queue.

I don't know about AviDemux, maybe you're doing something wrong? If you post more details, the devs might be able to help. (And I think h264 is probably more suited for current smartphones than xvid)

Also, resizing is probably not necessary, so you might try cutting out some scenes (depending on program only on keyframes) losslessly.

[LoRd_MuldeR]

Applying video filters, such as re-size unavoidably requires re-encoding the video! Are you sure that you changed the Video setting in Avidemux from "Copy" to "MPEG-4 ASP (Xvid)" ???

If not, then it is not much of a surprise that the resize filter didn't have any effect ;)

Also, when you resize the video to a smaller resolution, you usually should be able to get away with a lower bitrate, simply because there are fewer pixels to encode.

Anyway, the bitrate has absolutely nothing to do with how "smooth" the video plays! Instead, if the video bitarte is too low, you will get annoying compression artifacts, such as "blocking", "ringing" and "banding".

Last but not least: Why do you need to use an ancient format, such as MPEG-4 ASP? Doesn't your "galaxy pocket" support H.264/AVC? If so, you could get much better quality (at the same bitrate).

[morsh]

Yes galaxy pocket support H.264/AVC, do you know any tutorial that I can follow for converting video files like avi, wmv, mp4 into H.264/AVC ?

[setarip_old]

@morsh

Hi!

You might want to try MultiAVCHD...