FFmpeg: bad video quality in mpeg2

[KillerLoop]

I'm using ffmpeg 0.0.5 to compress .vob to .m2v using 4.000 kbit, but even trying raising the bitrate I always get compression "blocks" in part of the picture where the color is almost the same.

I have also tried to raise bitrate to 8.000 kbit but I get always the same bad quality result. I don't have problems with fast moving scenes, only with smooth color scenes where I see clearly the "blocks". What can I do?

Bye!

[toisanji]

I'm having the smae probs using the qt encoder with FFmpegX

[incredible]

I'm using ffmpeg 0.0.5 to compress .vob to .m2v using 4.000 kbit, but even trying raising the bitrate I always get compression "blocks" in part of the picture where the color is almost the same.

I have also tried to raise bitrate to 8.000 kbit but I get always the same bad quality result. I don't have problems with fast moving scenes, only with smooth color scenes where I see clearly the "blocks". What can I do?

Bye!

The answer often is that the quality of the source material isn't that good.
In many cases DVD-Material contains "grain" and when the mpeg2enc-engine trys to reencode it the result seems to be very "blocky".

Example: I reencoded the movie "U-571" at 2260 k/bit... very good source material. The result was an impressing quality by only using the 2260 bitrate.
Example 2: Reencoding the movie "Das Boot" gives me "blocky"-artifacts, no matter if reencoding with 2250 k/bit or 3800 k/bit. Because the source material contains viewable "grain".

Maybe a future release of the mpeg2enc-engine gives us a better quality.
I also heard the the quicktime mpeg2 engine gives better results, but in other cases people say that this isn't true.

[toisanji]

I am using DV footage straight from my camera so I am not sure if the "source quality" applies for me. Are you talkin about teh new quicktime update is supposed to be better? I ahvent tried it yet. I was going to wait for the new ilife stuff to come out before I try again, coz I am too busy.

I'm using ffmpeg 0.0.5 to compress .vob to .m2v using 4.000 kbit, but even trying raising the bitrate I always get compression "blocks" in part of the picture where the color is almost the same.

I have also tried to raise bitrate to 8.000 kbit but I get always the same bad quality result. I don't have problems with fast moving scenes, only with smooth color scenes where I see clearly the "blocks". What can I do?

Bye!

The answer often is that the quality of the source material isn't that good.
In many cases DVD-Material contains "grain" and when the mpeg2enc-engine trys to reencode it the result seems to be very "blocky".

Example: I reencoded the movie "U-571" at 2260 k/bit... very good source material. The result was an impressing quality by only using the 2260 bitrate.
Example 2: Reencoding the movie "Das Boot" gives me "blocky"-artifacts, no matter if reencoding with 2250 k/bit or 3800 k/bit. Because the source material contains viewable "grain".

Maybe a future release of the mpeg2enc-engine gives us a better quality.
I also heard the the quicktime mpeg2 engine gives better results, but in other cases people say that this isn't true.