Mencoder b-frame question

[dcrht]

Hi, I am a newbie who just started to learn how to encode about 2 weeks ago. Everything seems OK but when I try to use B-frame, there is stuttering produced (but nothing wrong in mplayer).

I cancel all options except b-frame in this (http://www.mediafire.com/?wmojoyjldei) video.

mencoder Robotica_1080.wmv -o test.mp4 -nosound -ovc x264 -x264encopts bitrate=1350:bframes=1:level=41:global_header:keyint=150 -vf scale=640:-2,expand=aspect=16/9 -fps 24000/1001 -of lavf

Please help me :(

--
Video source: http://download.microsoft.com/download/4/1/b/41b10a4f-f4f4-4692-aa44-a458d0047e91/Robotica_1080.exe

[nm]

MEncoder does not support MP4 output with libavformat perfectly. Just output the video as an H.264 elementary stream (-of rawvideo -o video.264) and mux it later with MP4Box.

[LoRd_MuldeR]

MEncoder displays this warning for a reason, I think :p

** MUXER_LAVF *****************************************************************
REMEMBER: MEncoder's libavformat muxing is presently broken and can generate
INCORRECT files in the presence of B-frames. Moreover, due to bugs MPlayer
will play these INCORRECT files as if nothing were wrong!
*******************************************************************************

Solution: Use the "standalone" x264 CLI encoder. MEncoder can write "raw" output to STDOUT and x264.exe can grab the frames from STDIN.

x264 does write proper MP4 and MKV files.

[recover]

It's pretty funny that both libavformat and MPlayer are broken and in effect they work together :P

[Dark Shikari]

It's pretty funny that both libavformat and MPlayer are broken and in effect they work together :PLibavformat isn't broken--the way mencoder interfaces with it is.