dvb thru avisynth (new to avsynth)

[vmrsss]

Hi there.

I am new to Avisynth. I typically encode DVB SD PAL broadcast of reasonably good quality (using eg ffmpeg and/or x264), and am currently investigating whether frame-serving through Avisynth may improve the quality of my encodes. Can people please point me to a cascade of filters known to do well with or be typical for sources of that kind?

I know about the basics like DGDecode, Crop, Resize, etc, so I suppose my main interest is to find my feet through the multitude of filters available with Avisynth, in particular denoising, deinterlancing, repairing, etc.

Thanks in advance for the help.

[Guest]

Can people please point me to a cascade of filters known to do well with or be typical for sources of that kind? There is no such generic recipe. Video differs way too much to allow such a simplistic approach.

Post a source sample and state what problems you have with it and what your intended format is.

[vmrsss]

Thanks neuron2, good idea.

I don't have a specific problem, it is just that often I come across (x264) encodes which use the same settings as I do and a lower bitrate, yet appear to me to they look so much better than mine. I suppose it can only be because of a better source, and I'd like to discover what those people do. (Everybody seems to be using Avisynth for pre-processing; I am not on windows, and that's why I don't. I have just started to try it out via wine.)

I uploaded a 60sec fragment of an m2v with a corresponding h264 fragment (mediafire URL below). They are both indicative of the kind of sources I have, and the kind of quality I get. (The encode turns out to be at 1000kbs over the entire 90 mins programme, and somehow I keep feeling I have seen much better at that size/bitrate ratio... By the way, the yuv to feed x264 is generated using ffmpeg -f yuv4mpegpipe, the scaling with ffmpeg's bilinear scaler -- typically I use bicubic, yet in this particular case the visual quality doesn't really change.)

http://www.mediafire.com/?sharekey=73478d4eada6528290a82c7bb0fad7ade0b26e55a028d38ec95965eaa7bc68bc

Thanks for sparing the time to give a look.

[Guest]

Have you posted the source streams or just your encodes?

So basically your question is "how can I get AVC encodes as good as something I've seen?"

You'd have to tell us what settings you use for your encoding.

[vmrsss]

As I said, I have included a fragment of source stream and the corresponding encode. The settings are written inside the encode at the beginning.

My question can be rephrased as asking: what would your Avisynth code be for this source?

Cheers

[Guest]

I can't look at this until this evening due to corporate firewall.