July 2012 - 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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Help with mencoder
by JD 27 Apr '13

27 Apr '13

Hi, I wanted to combine 12 flash video files (from youtube) into a single avi file. So I did cat at Zachar*.flv > Zach_all.flv $ mencoder Zach_all.flv -o Zach_all.avi -forceidx -ovc copy -oac pcm The output shows skipping frames, and missing aspect information, as you see below. What do I need to do to fix that, so thet when I am transcoding into .avi, I do not get these skips and missing aspect info? MEncoder SVN-r31628-4.4.5 (C) 2000-2010 MPlayer Team success: format: 0 data: 0x0 - 0x8378f0a libavformat file format detected. [flv @ 0x92d07a0] Estimating duration from bitrate, this may be inaccurate [lavf] stream 0: video (h264), -vid 0 [lavf] stream 1: audio (aac), -aid 0 VIDEO: [H264] 480x270 0bpp 29.917 fps 119.2 kbps (14.5 kbyte/s) [V] filefmt:44 fourcc:0x34363248 size:480x270 fps:29.917 ftime:=0.0334 ========================================================================== Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding) AUDIO: 44100 Hz, 2 ch, s16le, 49.5 kbit/3.51% (ratio: 6184->176400) Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio)) ========================================================================== videocodec: framecopy (480x270 0bpp fourcc=34363248) Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Pos: 0.7s 21f ( 0%) 14.38fps Trem: 0min 0mb A-V:0.067 [0:1411] Skipping frame! Pos: 1.1s 33f ( 0%) 18.45fps Trem: 0min 0mb A-V:0.068 [150:1411] Skipping frame! Pos: 6.0s 182f ( 0%) 38.81fps Trem: 65min 1014mb A-V:0.067 [148:1411] Skipping frame! Pos: 23.5s 706f ( 0%) 43.90fps Trem: 70min 1142mb A-V:0.067 [106:1411] Skipping frame! Pos: 38.4s 1153f ( 0%) 44.83fps Trem: 68min 1147mb A-V:0.067 [113:1411] Skipping frame! Pos: 57.4s 1723f ( 0%) 44.84fps Trem: 66min 1117mb A-V:0.068 [124:1411] Skipping frame! Pos: 76.9s 2306f ( 1%) 44.36fps Trem: 65min 1089mb A-V:0.067 [128:1411] Skipping frame! Pos: 98.4s 2950f ( 1%) 44.17fps Trem: 65min 1092mb A-V:0.067 [126:1411] Skipping frame! Pos: 117.5s 3522f ( 1%) 43.68fps Trem: 65min 1086mb A-V:0.067 [128:1411] Skipping frame! Pos: 132.5s 3972f ( 2%) 43.76fps Trem: 66min 1092mb A-V:0.067 [127:1411] Skipping frame! Pos: 153.7s 4608f ( 2%) 44.14fps Trem: 66min 1104mb A-V:0.067 [126:1411] Skipping frame! Pos: 173.1s 5190f ( 2%) 43.84fps Trem: 68min 1133mb A-V:0.067 [120:1411] Skipping frame! Pos: 190.3s 5705f ( 3%) 44.08fps Trem: 67min 1122mb A-V:0.067 [121:1411] Skipping frame! Pos: 211.7s 6347f ( 3%) 43.80fps Trem: 66min 1114mb A-V:0.068 [124:1411] Skipping frame! Pos: 228.7s 6856f ( 3%) 43.84fps Trem: 66min 1113mb A-V:0.067 [124:1411] Skipping frame! Pos: 248.1s 7436f ( 4%) 44.06fps Trem: 65min 1110mb A-V:0.067 [125:1411] Skipping frame! Pos: 265.3s 7954f ( 4%) 43.82fps Trem: 66min 1120mb A-V:0.067 [123:1411] Skipping frame!

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Help with MPG video encoding
by Walter Belhaven 20 Apr '13

20 Apr '13

Hi, I've got a question on how to get the best possible MPG encoding of a movie source, "at any price" so to speak -- i.e., as many bits as the encoder needs to get the highest possible video quality. It appears to me that the MPG encoding process is introducing artifacts that are present regardless of the amount of "free reign" I give to the encoder with respect to quantization, bitrate, and the like. My bottom line question is thus: "Are these artifacts inherent in MPG encoding, or am I just not twiddling the knobs and dials on the encoder correctly?" Here's all the details ... My source is a mixed hard- and soft-telecined "movie" at 1080/60i that I'm trying to tanscode to 480/24p, soft telecined to 480/60i, for ultimate burning to an NTSC DVD-Video. When I use mencoder to inverse telecine, crop out the crud, expand back to the original letterbox ratio (it's 2.35:1, not 16/9), and 'encode' the video with HUFFYUV (422P), the resulting video looks stunning, with no 'blocking' artifacts to speak of. This, of course, is as expected. But when I encode the video in MPG2 or MPG4, even with vqscale=1 or vqscale=2, I see sometimes severe blocking in the resulting video. Is this because the chroma is being subsampled vertically and horizontally (4:2:0), or is it because 'vqscale' is (perhaps necessary but) not sufficient to get "maximum quality at any price" encoding? Thanks, WB ____________________________________________________________________________________ Be a PS3 game guru. Get your game face on with the latest PS3 news and previews at Yahoo! Games. http://videogames.yahoo.com/platform?platform=120121

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hi!
by marco bernich 24 Jul '12

24 Jul '12

hello! I stand: Marco from Mar del Plata (Argentina) and I am new to the list ... use mplayer since I use linux (about 6 years ...) and am trying to edit video with mencoder. but ... I have a problem: I want to make a cut using this syntax: mencoder -ovc copy -oac copy -ss 55 -endpos 10 -o Corte.avi -idx /media/disco/Origen.avi cutting occurs, but not at the exact moment that indicated in '-ss'. occurs after a moment... any ideas? thanks and regards

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possible to explicity write duplicate frames?
by Jeffrey Laut 24 Jul '12

24 Jul '12

Is it possible to convert a video using mencoder, and have it write each frame that is a duplicate frame? I am recording webcam video with ffmpeg. Usually the first 5 to 7 frames are duplicate frames, and then there may be couple more throughout the video. I am then using opencv to analyze the video, but opencv does not see the duplicate frames. For example, if* *I tell ffmpeg to record at 10 fps for 300 seconds, I expect to have 3000 frames. Indeed, when I convert the video from the uncompressed to compressed using mencoder, it says there are 3000 frames. When I process the video using opencv, it is not counting the duplicate frames more than once, and therefore reporting less frames. I would like to have a video file where each frame is explicitly recorded. Is this possible? The command I use for converting is; mencoder -nosound -ovc lavc -o video_converted.avi video.avi I have also tried using the "-noskip" command. This removes the skipped frames from the video, which is not exactly what I want. I want to have the duplicate frames written as individual frames in the video file. Thank you for any help. -Jeff

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Sound stream is present but silent
by Richard H Lee 21 Jul '12

21 Jul '12

I have compiled mplayer/mencoder from svn trunk with the default configure options. When I try to re-encode videos with basic lavc, I get normal video with a sound stream, but the sound stream remains silent. This occurs on any video regardless of the format / codec used in the input video. This problem occurs both on cygwin and ubuntu. Would anyone know what might be the problem? $ ./mencoder.exe bears.mp4 -ovc lavc -oac lavc -o test.mp4 MEncoder SVN-r35019-3.4.4 (C) 2000-2012 MPlayer Team WARNING: OUTPUT FILE FORMAT IS _AVI_. See -of help. success: format: 0 data: 0x0 - 0x30a99b42 libavformat version 54.16.104 (internal) libavformat file format detected. [lavf] stream 0: video (mpeg4), -vid 0 [lavf] stream 1: audio (ac3), -aid 0, -alang und VIDEO: [MP4V] 720x400 24bpp 25.000 fps 1723.2 kbps (210.3 kbyte/s) [V] filefmt:44 fourcc:0x5634504D size:720x400 fps:25.000 ftime:=0.0400 ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders libavcodec version 54.36.100 (internal) AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16000->192000) Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3) ========================================================================== 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 Unsupported PixelFormat 61 Unsupported PixelFormat 53 Unsupported PixelFormat 81 Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4) ========================================================================== Movie-Aspect is 1.80:1 - prescaling to correct movie aspect. videocodec: libavcodec (720x400 fourcc=34504d46 [FMP4]) Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Pos:3521.3s 88032f (99%) 425.11fps Trem: 0min 432mb A-V:0.041 [800:224] Skipping frame! Pos:3521.3s 88033f (99%) 425.11fps Trem: 0min 432mb A-V:0.040 [800:224] Flushing video frames. Writing index... Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Video stream: 800.608 kbit/s (100075 B/s) size: 352395585 bytes 3521.280 secs 88033 frames Audio stream: 224.000 kbit/s (28000 B/s) size: 98595168 bytes 3521.256 secs

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what happened to -vf mcdeint
by Sean Y Chen 13 Jul '12

13 Jul '12

I've been searching all over the net. Am I the only one who doesn't seem to have mcdent in my Mencoder? Do I need to compile from sources?

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Pullup problem for stubborn recording
by L. Lee 10 Jul '12

10 Jul '12

I'm not able to detelecine one particularly stubborn recording. Instead of getting 6 sets of 4 clean frames per second (pppp), my routine gives me 3 clean and one blurred (pppi). Here's a clip, if you'd care to help, please. https://dl.dropbox.com/u/42718751/tag.mp4 I normally use a filmdint operation to apply pullup, but "-vf pullup, softskip" appears to yield pppii. mencoder infile.mp4 -o outfile.mp4 -vf filmdint,scale=1280:720 -noskip -of lavf -lavfopts format=mp4 -aspect 16/9 -nosound -fps 30000/1001 -ofps 24000/1001 -ovc x264 -x264encopts preset=slower:tune=film:crf=28:bitrate=1800:bframes=0:global_header:threads= auto:frameref=3 Thanks. Laine Lee

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Audio/Video Sync Issue
by llarevo＠gmx.net 01 Jul '12

01 Jul '12

Hi, I have the same problems with dvb-t-captureing using the 1.1 release as reported by Linux <linux(a)thehoytfamily.com> on 2012-06-01. The problem occured the first time when upgrading to Fedora 16. MPlayer-1.0rc4 is working well in F16, but i couldn't get it to compile in F17. There seams to be some issue with the detection of duplicate frames. The output of the 1.1 release while capturing is http://pastebin.com/TfRvWpFp Every 10th frame is marked as duplicate, the framrate remains at about 22 fps. For comparison the output of an older working mencoder release is http://pastebin.com/p8nQLGEx After 102 frames there are no more duplicate frames and the framerate rises to 25 fps. I tried the options mpegopts=format=dvdmpeg2:tsaf=1:vframerate=25:muxrate=10000:vbitrate=10000 noskip=1 fps=25 ofps=25 mc=0 vf=softskip,harddup in different combinations, none worked. What to do next? Can anybody help? Regards -- Felix

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