Target size wont work

[trocheos]

Hi guys im running mediacoder (built 5360) and if im setting my videosettings on "Auto Bitrate", "Outputsize",and "2-Pass", mediacoder allways puts out a file which wont be bigger than 3mb even if i set it on a target size of 140mb or more. Source file is a h.264 stream in a mkv container. Im using x264 and mencoder as source. Please can anyone help me i tried it on my one since several weeks but no sucess. would be nice if someone knows the solution for my problem.
(sorry for my english im german)

[fredbe9300]

It's been a while since I've used target size, as I strongly prefer quality target (--crf n)

You could try with a target bitrate (work out yourself, from the length of the clip, what the bitrate should be).
Otherwise, post a screengrab of the screen where you set this stuff, or post a profile.xml based on your settings, so we can see if it looks good.
Or copy the output from the console window (press F6 to toggle it)

just some ideas.

I just recoded a 2 minute, 10MB, clip, with target size 7MB. It came out at 8MB, which is fine.

[meRobs]

You haven't mentioned the duration of the file nor the bitrate achieved in the output.
Most video encoders have a limit as to the maximum bitrate they can achieve and this will depend on the chosen profile/level, etc.
See the Guide on x264 encoding at viewtopic.php?f=17&t=11026
Maybe, in your case, the max achievable bitrate multiplied by the duration is only 3 MB?

[stanley]

If duration is correctly identified, target size setting will not work.

[meRobs]

If duration is correctly identified, target size setting will not work.

Please explain.

[stanley]

When setting target size, the bitrate is calculated from the size and duration.

[meRobs]

If duration is correctly identified, target size setting will not work.

So what you meant to say was that if the Duration is known and the Target Size is set, the bitrate cannot also be set (because it is already defined by the size and duration).

[stanley]

This should not happen, as long as if the video bitrate mode is ABR or CBR.

[james]

I'm finding this exact same problem. File size just doesn't work. For instance I started with 1GB of files, tried to convert them to 800 megs, and instead got a 2.7 GB file.

Surely it's pretty easy to figure out what the bitrate should be set to based on the length of the file and the required filesize (preferably minus the size of the sound data)?

Lots of other programs do this, and there are even simple calculators for this, so I don't understand how such a full featured and impressively fast program such as Mediacoder can't get this simple thing working correctly. If a user want to sacrifice quality to hit a particular filesize, Mediacoder should respect that, and not over-ride the settings.

[stanley]

To clarify, this feature IS working.