[Ffmpeg-devel] Differences between mencoder and ffmpeg when encoding using x264 (original) (raw)

Erik Slagter erik
Sun Feb 19 18:03:01 CET 2006

On Sun, 2006-02-19 at 16:50 +0100, Michael Niedermayer wrote:

> Give very different results, although as far as I can see the relevant > options are the same. The mencoder command line gives much better > quality (visually) using the same bit rate, almost no blockyness, while > the ffmpeg output is full of blocks.

well, remove one option at a time until no removial is possible anymore witout reducing the diffence in quality

I have removed all options that are non-essential, leaving this:

mencoder -frames 500 -nosound -ovc x264 -of rawvideo -vf "lavcdeint"
-x264encopts "bitrate=3000:nocabac:bframes=0:vbv_maxrate=9000:vbv_bufsize=8000:me=1:subq=1:threads=1"
-o videovideo videovob

ffmpeg -deinterlace -t 24 -y -i 1−aspect4:3−minrate0−maxrate9000−b3000−bufsize8000−vcodech264−an−fh264"1 -aspect 4:3 -minrate 0 -maxrate 9000 -b 3000 -bufsize 8000 -vcodec h264 -an -f h264 "1−aspect4:3−minrate0−maxrate9000−b3000−bufsize8000−vcodech264−an−fh264"video"

The extra options for mencoder are to mimic ffmpeg behaviour.

The difference in quality is stunning.

I'll update (once again) and clean/recompile everyhing in the meantime, you never know. -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 2771 bytes Desc: not available URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20060219/13141e6f/attachment.bin>

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