Re: [Libav-user] Convert MP4 1280x720 to MPG 1280x720

[Thomas H]

Hello Michael

That did it. Eliminated ntsc-dvd and now it works fine.

ffmpeg -i MyKitty.mp4 -vf scale=1280:720 -idct h264 -sameq MyKitty.mpg

Thanks for your response.

Regards
Thomas

On Tue, May 29, 2012 at 8:29 PM, Thomas H thom1...@gmail.com wrote:
 Hello Michael

 Thanks for the link.

 I have a DVD Burner program that only accepts avi, dvr_ms, mpg, mpeg,
 mpv, wmv, or asf files. I am trying to convert mp4 files to one of
 those.
 While I can convert to mpg, the mpg file is pixelated, less quality
 than the original when I compare them using VLC Media Player.

 Regards
 Thomas

 On Tue, May 29, 2012 at 5:28 PM, Michael Bradshaw
 mbrads...@sorensonmedia.com wrote:
 On Tue, May 29, 2012 at 3:04 PM, Thomas H thom1...@gmail.com wrote:
 Hello Carl.

 Not sure.
 Tried everything in the Docs and FAQ.
 I searched everywhere and found it on a forum.
 When I run:
 ffmpeg -i MyKitty.mp4 -vf scale=1280:720 -idct h264 -sameq -target
 ntsc-dvd MyKitty.mpg

 I'm curious about this. NTSC DVDs are 720x480, not 1280x720. You may
 want to look at this:
 http://en.wikipedia.org/wiki/DVD-Video#Frame_size_and_frame_rate

 What exactly is it that you are trying to accomplish?

 --Michael
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[Libav-user] Convert MP4 1280x720 to MPG 1280x720

[Thomas H]

ffmpeg -i MyKitty.mp4 -vf scale=1280:720 -idct h264 -sameq -target
ntsc-dvd MyKitty.mpg

Input file:
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x720, 944 kb/s, 30 fps, 30 tbr, 60 tbn, 60 tbc
Output file:
Stream #0:0(und): Video: mpeg2video, yuv420p, 1280x720, q=2-31,
6000 kb/s, 90k tbn, 29.97 tbc

Output is not of the same quality.
I have a suspect it has something to do with the Video, but do not
know how to correct this.
I have been working on this for about a week and can not figure it out.

Regards
Thomas
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Re: [Libav-user] Convert MP4 1280x720 to MPG 1280x720

[Carl Eugen Hoyos]

Thomas H thom1948@... writes:

 ffmpeg -i MyKitty.mp4 -vf scale=1280:720 -idct h264 -sameq -target
 ntsc-dvd MyKitty.mpg

(Complete, uncut console output missing.)

Are you sure you want to produce a HD DVD?
Please explain what -idct h264 does, I am curious.

And please note that -sameq does not mean same quality.
(Especially not for h264 - mpeg1 conversion.)

Carl Eugen

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