FfmpegX corrections for Keyframe interval
Hi major,
Please check the default setting for "Keyframe interval". It's defaulting to 240, instead of 24 (or 18 ) 8O So when an MPEG is created, the maximum frames per GOP can go up to 240 frames (Bs and Ps) before the next I frame. P.S. I'm heavily testing ffmpeg/ffmpegX at this moment ;) -kwag |
Hi kwag,
"Keyframe interval" is a mpeg-4 parameter. It is not used for mpeg-2. Gop values of 240 are normal for mpeg-4. For mpeg-2, gop size is always set to 12, excepted when kvcd profile is selected. |
Quote:
If I encode an MPEG-1 with the keyframe set to 240, my encoded MPEG has a long GOP :!: Look at the values going above 24: http://www.digitalfaq.com/archives/error.gif And look at the GOP when I change it to 24: http://www.digitalfaq.com/archives/error.gif -kwag |
I meant mpeg-2 with mpeg2enc uses 12 as GOP. For ffmpeg you should go through the "fast mpeg-1" preset which also sets GOP to 12.
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Ok, thanks :)
-kwag |
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