Best decoder for source video?

[marcorocchini]

Hi

considering my source is: https://dl.dropboxusercontent.com/u/39871584/C0020.mxf

Please go to my dropbox (user: mrocchini@email.it pass: centrale, folder: public) and download ffmpeg.exe / ffmbc.exe

so please do

1) ffmbc -i c0020.mxf -vcodec mjpeg -pix_fmt yuvj422p -sameq -vf colormatrix=bt709:bt601 -vtag MJPG -an 1ffmbc.avi

2) ffmpeg -i c0020.mxf -vcodec mjpeg -pix_fmt yuv422p -q:v 0 -vf colormatrix=bt709:bt601 -vtag MJPG -an 2ffmpeg.avi

3) ffmpeg -i c0020.mxf -vcodec mpeg2video -pix_fmt yuv422p -g 0 -q:v 0 -an -flags +ilme+ildct -alternate_scan 1 -top 1 3crocodileMPEG2.avi

1 and 2 are mjpeg

3 are mpeg2Iframe

What is the best result: 1, 2 or 3?

ps: add or remove colormatrix bt conversion depending on your monitor

Seems to me 1 (ffmbc) is the best clean.

psps: as decoder I use ffdshow (mpegINavi/mjpg)

[Krispy Kritter]

There isn't a "best". It's a matter of personal preference. Choose which you prefer, which fits your desired usage, or by file size.

[marcorocchini]

I was expected to see at least one of the differences between one mjpeg and one mpeg2I but semms extremely identical (with a slight preference for the ffmbc.exe one)

[Brazil]

ps: add or remove colormatrix bt conversion depending on your monitor

No, it does not depend on your monitor but on the resolution being used.
BT.709 is for HD (> 1024x576) whilst BT.601 is used for SD.
http://en.wikipedia.org/wiki/Rec._709

Your monitor and your video drivers must be correctly set to accept both.

[jagabo]

I was expected to see at least one of the differences between one mjpeg and one mpeg2I

Why? MJPEG and MPEG 2 with all I frames are nearly the same thing. They use similar DCT and entropy compression schemes.

[Cornucopia]

At this point, I would think that your preference would be determined by target device/system compatibility requirements...

Scott

[marcorocchini]

I would like "move" the ffmbc libraries from the ffmbc.exe (I prefer) intoto the ffmpeg. So you demand: why you don't use directly ffmbc.exe?
because ffmpeg "print" the timecode in output avi files, and ffmbc no.

Can I do it?

[redwudz]

marcorocchini, in the future please use a more descriptive subject title in your posts to allow others to search for similar topics. I will change yours this time. From our rules:

Try to choose a subject that describes your topic.
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Thanks,
Moderator redwudz