January 2014 - MEncoder-users - lists.mplayerhq.hu

change frame rate
by Shiyuan 28 Feb '14

28 Feb '14

Hi, I have an avi video with 5000 frames. The original frame rate is 15 frames/per second, and it takes 300 seconds to play the whole video. I want the video to play faster so that it takes less time to complete, so I change the frame rate using the following command: mencoder in.avi -o out.avi -ofps 100 -ovc copy However, out.avi still take around 300 seconds to complete, even though out.avi does have fps of 100fps according to the info displayed by mplayer. What command options should I use if I want the output video to be complete in 50 sec? Thanks. Shiyuan

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making movies from jpg's
by Django [BOfH] 20 Jan '14

20 Jan '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, I've got two weatherwebcams (http://webcam.nausch.org) From 4:00 am to 10:59 pm the cam makes every minute a picture. at the end of a day so I've 1140 pictures. If the light outside is to dark, the cam's produce grayscale pictures, at "normal light" the cam's produce color picture. If I try to make my movie with: /usr/bin/mencoder mf://*.jpg -mf w=1920:h=1080:fps=25:type=jpg \ -ovc lavc -lavcopts vcodec=mjpeg -oac copy \ -force-avi-aspect 1.78:1 -o output.avi mencoder is crashing with a segmentation fault. :( MEncoder SVN-r31628-4.4.6 (C) 2000-2010 MPlayer Team success: format: 16 data: 0x0 - 0x0 MF file format detected. [mf] search expr: *.jpg [mf] number of files: 1140 (9120) VIDEO: [IJPG] 1920x1080 24bpp 25.000 fps 0.0 kbps ( 0.0 kbyte/s) [V] filefmt:16 fourcc:0x47504A49 size:1920x1080 fps:25.000 ftime:=0.0400 Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1 ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG) ========================================================================== Could not find matching colorspace - retrying with -vf scale... Opening video filter: [scale] Movie-Aspect is 0.89:1 - prescaling to correct movie aspect. [swscaler @ 0x3390520] using unscaled gray -> yuv420p special converter videocodec: libavcodec (720x810 fourcc=47504a4d [MJPG]) [mjpeg @ 0x335e0a0] EOI missing, emulating Writing header... ODML: vprp aspect is 16384:9204. Writing header... ODML: vprp aspect is 16384:9204. Movie-Aspect is 0.89:1 - prescaling to correct movie aspect..000 [45659:0] Segmentation fault First I thought, there were an error with the picture-size (1820x1080). So I reduced the pictures to 720x405 At next point I thought, there were something bad with the actual mplayer/mencoder-version. But on three different machines and distributions, the same shit happens. 'cause the seg-fauld happens at the same time, I think, that happens when my pictures changing from grayscale to color. So how can I make my movies again, as I've done with my old cams (http://www.youtube.com/watch?v=J0pxYLVVPT4) These made black pictures if light was to dark and so I've no problem with mencoder. Any idea? Every suggestion is welcome! ttyl Django -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJS3AppAAoJEAdOz2FQpr/t35sQAJvqwk2P7AuQqnuFJbDv+lLF pgAfXHnopO5vwKCcL/+tdqKpIMkPqXu4wAMNtqeyBBUjwb/0IWwzs7Bhs5LAiTSg lBqYCvmpXl/tpnjPBcLbEGjzdZ50HWQ4TdZNTivSQpFuNC/5KILfVVmIjNvm6nmz eFs+DbJmHRgJWSpyr0qjQxUBlaTI2B1obZby5iA4zWPKrncwoxt1X+03y2+vrjWS QOSX6YlojeV6TmK4NXyty1zUdToZctfJ6mq2o9Vh9t5NAoXPsbX0KLzdWqYwuYQp dd5fYKN1SGgiOCSlHjSHA9UH/yUlIaswaYMJ4wQAXs9+nj0iknDNARlYcYV14LFN VpoFEGLhIngdJ599PQboMH5Plz3i6HJhXpW7Vk6iDT9Wwaht/ShUB5x6GkI3YINf 2UFT06HHzaYVJEIrTqILuo3sh8wu3GqPoiMHuTv03HYDX+HvL81kgZYEfQ5q2ncM s/dhwQOjBi+mVUoNMbqrD+Vk20xbL81xWIH+o5u6OkTF964B6EQ4X5CVkYzRoigN T8Ge35l/vAuxqldQjwcOHXsiD5K8nsp/sTEwHZ8lU/n/kscOZuLdh9MTcZbKem65 meyxMO6sioCagnoozGRNexS0cm9cExk0ZKna9Xuh0TjB8XHxbygH9zyoDsNkI+r3 kwEm6xVQ2Vk+HWV2ASkz =EwFo -----END PGP SIGNATURE-----

4 9

sync video and audio
by Daniel Kirsten 17 Jan '14

17 Jan '14

Dear list, I have made some videos using a Canon 70D. I try to reencode them to save disc space. I tried mencoder t-orig.mov -o t-encoded.avi -ovc lavc -oac lavc -lavcopts vcodec=mpeg4:mbd=2:mv0:trell:v4mv:o=mpv_flags=+cbp_rd:last_pred=3:preme=2:predia=3:dia=4:vmax_b_frames=2:vb_strategy=1:precmp=0:cmp=3:subcmp=3:o=quantizer_noise_shaping=2:vbitrate=8000:acodec=mp2 Video and audio are not synchron. How can I synchronize video and audio? I tried combinations of -mc 0 and -noskip, but the result dod not change. t-orig.MOV is available under https://www.dropbox.com/s/tgtaxwhftu9z4tu/t-orig.mov Best regards, Daniel

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