ffmpeg quality problem

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ffmpeg quality problem

Postby Oat » Wed Jun 11, 2008 5:31 pm

I use ffmpeg on linux for converting my raw videos to .flv files at 1600 bitrate.

However, the quality is reasonable at 181mb but the crosshair could barely be seen due to the pixel blocks on the video despising the quality.

Any idea how to improve the quality without affecting the file size for internet?

Avidemux cannot open or save .flv files so I resorted to ffmeg.

This is the code I use in terminal for converting:

ffmpeg -i dpvideo000.avi -ar 22050 -b 1600 -s 640x480 movie.flv

-i = input file name
-ar = audio rate
-b = bitrate
-s = size
Oat
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Re: ffmpeg quality problem

Postby KadaverJack » Wed Jun 11, 2008 5:57 pm

Deaf-OAT wrote:Avidemux cannot open or save .flv files so I resorted to ffmeg.

You are probably using an outdated version. Both import and export works fine for me with 2.4.1...
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Postby Oat » Sat Jun 14, 2008 12:03 pm

www.militia.nexuizclans.com

Please watch the video and you will see that the quality is not so good. The crosshair cannot be seen at all and the words on the screen are unreadable.

Seeing as I'm on linux, I used ffmpeg for this so I need some help from video experts on which programs I should use for converting raw .avi to .flv file?

The quality must be excellent despise the file's size?

I captured the game on high resolution (1280x768 i think) which resulted in a 30gb raw avi then converted to .flv using 1600kb bitrate (at 640x380) which results in a 181mb flv video. Was that a mistake? Should I capture it in 640x380?

Help! Thanks
Oat
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Joined: Mon May 12, 2008 3:40 pm

Postby KadaverJack » Sun Jun 15, 2008 5:04 am

Deaf-OAT wrote:Please watch the video and you will see that the quality is not so good. The crosshair cannot be seen at all and the words on the screen are unreadable.

Seeing as I'm on linux, I used ffmpeg for this so I need some help from video experts on which programs I should use for converting raw .avi to .flv file?

I'm no expert either, but i don't think there's anything you could do with ffmpeg (or any other encoder). I would recommend to use a larger crosshair with no transparency for recording.

Should I capture it in 640x380?

You could save a lot of time and hdd space by doing so ;)
the result should look pretty much the same, maybe even slightly better, depending on scaling algorithm...
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