December 2011 - MEncoder-users - lists.mplayerhq.hu

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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some minutes delay between audio and video
by Malte Schünemann 06 Jan '12

06 Jan '12

I am frequently converting videos coming via satellite as transport stream. I recently experienced a strange delay between the audio and the video part that is in the range of minutes. Indeed, the mencoder output shows 1 duplicate frame(s)! Pos: 4.6s 108f ( 4%) 13.14fps Trem: 3min 0mb A-V:-0.047 [5221:0] Pos: 4.7s 109f ( 4%) 13.25fps Trem: 3min 0mb A-V:-0.051 [5182:0] Pos: 4.8s 110f ( 4%) 13.36fps Trem: 3min 0mb A-V:-0.055 [5185:0] Pos: 4.8s 111f ( 4%) 13.46fps Trem: 3min 0mb A-V:-0.059 [5184:0] Pos: 4.8s 112f ( 4%) 13.57fps Trem: 3min 0mb A-V:-0.063 [5189:0] and then later Pos: 65.1s 1482f ( 4%) 65.87fps Trem: 8min 0mb A-V:-0.063 [7214:0] Pos: 65.2s 1483f ( 4%) 65.88fps Trem: 8min 0mb A-V:-0.067 [7216:0] Too many video packets in the buffer: (93 in 33778112 bytes). Maybe you are playing a non-interleaved stream/file or the codec failed? For AVI files, try to force non-interleaved mode with the -ni option. Pos: 65.2s 1484f ( 5%) 64.46fps Trem: 7min 816mb A-V:-0.063 [7217:192] Pos: 65.2s 1485f ( 5%) 64.48fps Trem: 7min 816mb A-V:-0.059 [7220:192] ... When playing the resulting video, audio starts immediately - but is shifted - approximately by the 65.2 sec from the output above (when the audio rate turns 192). The problem happens only if I attempt to cut out advertisings - so far I only observed the problem at the beginning of the file (cutting off the first 5 minutes). I tried to overcome the problem with -audio-delay, but had no success. How can I overcome this problem ? Any suggestion welcome :-) My options are usually the following. -ofps 25 -hr-edl-seek -demuxer lavf -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd:tsaf -vf scale=720:576,harddup -srate 48000 -af volnorm=2:0.15:lavcresample=48000 -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=9800:keyint=25:vstrict=0:acodec=ac3:abitrate=192 -ofps 25 -edl file.edl -o video.mpg video.ts Thanks Malte

2 9

Edit Decision List - exact frame cut problem.
by Bill Crockett 06 Jan '12

06 Jan '12

I am trying to remove advertisements from an MPEG-TS video using the Edit Decision List commands. mplayer -edlout cut.dat videoTS.mpg mencoder -edl cut.dat -ovc copy -oac copy -noskip -mc 0 -of mpeg -mpegopts format=mpeg2:muxrate=9088:interleaving2:tsaf:adelay=160 videoTS.mpg -o cut_test.mpg Using -edlout, if I cut right on where the film starts, it cuts out approximately 30 seconds off the start of the film. If I cut slightly before the film starts, it then shows too much of the ad. The same happens when cutting out the advertisements from their start to their end during the film. I just can't get it to cut exactly on the black spots where the film or ad fades out.

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Re: [MEncoder-users] Combining .flv files
by Fatima Hussain 22 Dec '11

22 Dec '11

Thank you very much for your reply. The length of each video is around 9 to 10 seconds: When i run them through VLC, 1.flv = 0.09 sec 2.flv = (0.09 sec) by now total of 0.18 sec 3 flv = (0.09 sec) by now total of 0.27 sec 4.flv = (0.10 sec) by now total of 0.37 sec 5 flv = (0.10 sec) by now total of 0.47 sec 6 flv = (0.09 sec) by now total of 0.56 sec I also tried using -ofps through this command: [root]# /usr/bin/mencoder -forceidx -of lavf -oac copy -ovc copy -o output4.flv 1.flv 2.flv 3.flv 4.flv 5.flv 6.flv -ofps 4 But it did not work. I have uploaded my files at : https://github.com/fatimaohussain/CombineFLV Just in case if you would like to have a look. I really appreciate your help and will be very grateful for any more suggestions. Thanks a lot, Fatima On Wed, Dec 21, 2011 at 1:25 PM, Gabri Nurtinaz Shally <gabri.ns(a)gmail.com>wrote: > can you tell us length of each video? > from the log, its look like mencoder detect the content as 1000fps video. > it may because of this you get short video. you can add -ofps <desired > frame rate> to force fps value. > > hope its help... > On Dec 22, 2011 1:08 AM, "Fatima Hussain" <fatima.ohussain(a)gmail.com> > wrote: > >> Thank you very much for your reply. >> >> Here is the output: >> >> >> >> --------------------------------------------------------------------------- >> [root]# /usr/bin/mencoder -forceidx -of lavf -oac copy -ovc copy -o >> output1.flv 1.flv 2.flv 3.flv 4.flv 5.flv 6.flv >> >> MEncoder 1.0rc2-4.1.2 (C) 2000-2007 MPlayer Team >> CPU: Intel(R) Pentium(R) 4 CPU 2.66GHz (Family: 15, Model: 2, Stepping: 9) >> CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 >> Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2 >> >> success: format: 0 data: 0x0 - 0xcfcec >> libavformat file format detected. >> [lavf] Video stream found, -vid 0 >> VIDEO: [FSV1] 1280x800 0bpp 1000.000 fps 0.0 kbps ( 0.0 kbyte/s) >> [V] filefmt:44 fourcc:0x31565346 size:1280x800 fps:1000.00 >> ftime:=0.0010 >> ** 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! >> >> ******************************************************************************* >> OK, exit >> videocodec: framecopy (1280x800 0bpp fourcc=31565346) >> VIDEO CODEC ID: 89 >> Writing header... >> success: format: 0 data: 0x0 - 0x5c4adm: 0min 0mb A-V:0.000 [0:0] >> libavformat file format detected. >> [lavf] Video stream found, -vid 0 >> VIDEO: [FSV1] 1280x800 0bpp 1000.000 fps 0.0 kbps ( 0.0 kbyte/s) >> [V] filefmt:44 fourcc:0x31565346 size:1280x800 fps:1000.00 >> ftime:=0.0010 >> videocodec: framecopy (1280x800 0bpp fourcc=31565346) >> success: format: 0 data: 0x0 - 0x58264m: 0min 1mb A-V:0.000 [0:0] >> libavformat file format detected. >> [lavf] Video stream found, -vid 0 >> VIDEO: [FSV1] 1280x800 0bpp 1000.000 fps 0.0 kbps ( 0.0 kbyte/s) >> [V] filefmt:44 fourcc:0x31565346 size:1280x800 fps:1000.00 >> ftime:=0.0010 >> videocodec: framecopy (1280x800 0bpp fourcc=31565346) >> success: format: 0 data: 0x0 - 0x5920em: 0min 1mb A-V:0.000 [0:0] >> libavformat file format detected. >> [lavf] Video stream found, -vid 0 >> VIDEO: [FSV1] 1280x800 0bpp 1000.000 fps 0.0 kbps ( 0.0 kbyte/s) >> [V] filefmt:44 fourcc:0x31565346 size:1280x800 fps:1000.00 >> ftime:=0.0010 >> videocodec: framecopy (1280x800 0bpp fourcc=31565346) >> success: format: 0 data: 0x0 - 0x586a4m: 0min 1mb A-V:0.000 [0:0] >> libavformat file format detected. >> [lavf] Video stream found, -vid 0 >> VIDEO: [FSV1] 1280x800 0bpp 1000.000 fps 0.0 kbps ( 0.0 kbyte/s) >> [V] filefmt:44 fourcc:0x31565346 size:1280x800 fps:1000.00 >> ftime:=0.0010 >> videocodec: framecopy (1280x800 0bpp fourcc=31565346) >> success: format: 0 data: 0x0 - 0x6b031m: 0min 2mb A-V:0.000 [0:0] >> libavformat file format detected. >> [lavf] Video stream found, -vid 0 >> VIDEO: [FSV1] 1280x800 0bpp 1000.000 fps 0.0 kbps ( 0.0 kbyte/s) >> [V] filefmt:44 fourcc:0x31565346 size:1280x800 fps:1000.00 >> ftime:=0.0010 >> videocodec: framecopy (1280x800 0bpp fourcc=31565346) >> Writing index...79f (100%) 0.00fps Trem: 0min 2mb A-V:0.000 [0:0] >> >> Video stream: 123033.117 kbit/s (15379139 B/s) size: 2752866 bytes >> 0.179 secs >> 179 frames >> >> Thanks a lot, >> Best Regards, >> Fatima >> >> On Wed, Dec 21, 2011 at 12:36 PM, Gabri Nurtinaz Shally < >> gabri.ns(a)gmail.com> wrote: >> >>> can you put the output of mencoder too? >>> you can gather some information from there >>> >>> my first guess is because the absence of audio track >>> On Dec 22, 2011 12:17 AM, "Fatima Hussain" <fatima.ohussain(a)gmail.com> >>> wrote: >>> >>> > Hi, >>> > >>> > I am trying to combine a few .flv files which i have generated myself >>> > through a screen recording Java application. >>> > >>> > These files do not have any sound. >>> > >>> > I am using the command: >>> > >>> > mencoder -forceidx -of lavf -oac copy -ovc copy -o combined.flv *.flv >>> > >>> > (I later want to combine a .wav sound file with the combined.flv). >>> > >>> > The problem is that in the combined.flv, i am only getting one or two >>> > seconds of video and nothing else gets combined. >>> > >>> > I am not sure what is going wrong here. >>> > >>> > Thank you very much, >>> > Best Regards, >>> > Fatima >>> > _______________________________________________ >>> > MEncoder-users mailing list >>> > MEncoder-users(a)mplayerhq.hu >>> > https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users >>> > >>> _______________________________________________ >>> MEncoder-users mailing list >>> MEncoder-users(a)mplayerhq.hu >>> https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users >>> >> >>

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Combining .flv files
by Fatima Hussain 22 Dec '11

22 Dec '11

Hi, I am trying to combine a few .flv files which i have generated myself through a screen recording Java application. These files do not have any sound. I am using the command: mencoder -forceidx -of lavf -oac copy -ovc copy -o combined.flv *.flv (I later want to combine a .wav sound file with the combined.flv). The problem is that in the combined.flv, i am only getting one or two seconds of video and nothing else gets combined. I am not sure what is going wrong here. Thank you very much, Best Regards, Fatima

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many mencoder questions from a newbie
by Janos Szamosfalvi 20 Dec '11

20 Dec '11

Howdy, I'm trying to use mencoder to create quality mp4's playable on a lowly Velocity Cruz T301 tablet, and I have a few questions about mencoder. First, I was looking for a download link on the mplayer site for the latest version of mencoder, but I couldn't find it. I have: "MEncoder Sherpya-SVN-r30521 (C) 2000-2010 MPlayer Team" Is there a newer version available somewhere? In a log like below: Pos: 2.7s 75f (55%) 8.81fps Trem: 0min 1mb A-V:0.011 [1942:127] Pos: 2.7s 76f (55%) 8.75fps Trem: 0min 1mb A-V:0.014 [1961:128] Pos: 2.8s 77f (55%) 8.72fps Trem: 0min 1mb A-V:0.017 [1976:127] what does the A-V section, and the numbers in the [ ] bracket mean? What do these telecine numbers mean? telecine = 1.5 0.243 telecine = 1.5 -0.054 telecine = 1.0 -0.279 the first one is always 1.0 or 1.5 as far as I can see, the 2nd seems to be between -0.5 and 0.5 Is there some document that describes the content of the x264 info at the end of the encoding? x264 [info]: frame I:15 Avg QP:13.43 size: 25791 PSNR Mean Y:55.78 U:55.67 V:59.12 Avg:56.13 Global:49.73 x264 [info]: frame P:220 Avg QP:17.15 size: 7385 PSNR Mean Y:50.96 U:51.06 V:55.24 Avg:51.41 Global:47.31 [...] x264 [info]: ref B L1: 96.8% 3.2% x264 [info]: SSIM Mean Y:0.9926010 x264 [info]: PSNR Mean Y:54.671 U:54.939 V:58.797 Avg:55.133 Global:47.369 kb/s:1521.26 I think I can guess some of these fields, but most aren't exactly clear to me. Because the tablet I have appears to be a bit underpowered, it is crashing on sections that (I presume) are encoded with higher bitrate, so I figured that I will use "vbv_maxrate" to set an upper limit about 10% above the average bitrate, but as far as I can see, it has no effect. With a bitrate of 1500, I tried maxrate of 1800, 1700, 1600, 1500, 1400, 1200 but the resulting .mp4 files turned out to be identical.... Any idea on why is that happening? At least for the last 2, it should've just erred out. Here are my commandlines for a 2 pass encoding: mencoder Title4.mpg -ss 4 -of lavf -lavfopts format=mp4 -o /dev/null -ofps 30000/1001 -vf crop=720:464:0:8,scale=720:432,harddup -ovc x264 -x264encopts turbo:pass=1:bitrate=1500:subq=4:frameref=2:8x8dct:bframes=3:b_pyramid=normal:weight_b:keyint=30:vbv_maxrate=1600:threads=auto:psnr:ssim -srate 44100 -af format=s16le -oac mp3lame -lameopts cbr:br=128 mencoder Title4.mpg -ss 4 -of lavf -lavfopts format=mp4 -o Title4h.mp4 -ofps 30000/1001 -vf crop=720:464:0:8,scale=720:432,harddup -ovc x264 -x264encopts pass=2:bitrate=1500:subq=5:frameref=3:8x8dct:bframes=3:b_pyramid=normal:weight_b:keyint=30:vbv_maxrate=1600:threads=auto:psnr:ssim -srate 44100 -af format=s16le -oac mp3lame -lameopts cbr:br=128 TIA

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Encoding non-photographic data
by Torbjörn Rathsman 18 Dec '11

18 Dec '11

What options should I use for encoding a sequence of images containing non-photographic data. This results in very unsaturated colors: mencoder mf://../frames/%%d.png -mf fps=25 -vf scale=-3:720,crop=1280:720 -o ../video/new-video.avi -ovc lavc -lavcopts vcodec=mpeg4:mbd=2:mv0:trell:v4mv:cbp:last_pred=3:predia=2:dia=2:vmax_b_fram es=2:vb_strategy=1:precmp=2:subcmp=2:preme=2:qns=2:vbitrate=30000000 I tried hue=0:1.125,eq=5:5 but it is still to pale. Any ideas?

1 0

Problem with generating video from image files
by Torbjörn Rathsman 18 Dec '11

18 Dec '11

I am trying to create a video file from a set of image file using the following command: mencoder mf://../frames/%d.png -mf fps=25 -o ../video/new-video.avi -ovc lavc -lavcopts vcodec=mpeg4:mbd=2:mv0:trell:v4mv:cbp:last_pred=3:predia=2:dia=2:vmax_b_fram es=2:vb_strategy=1:precmp=2:subcmp=2:preme=2:qns=2:vbitrate=30000000 After it comes to a completly black frame it says "The selected video_out device is incompatible with this codec." and aborts without generating a valid video file. If I remove the black frame, everything works fine. How should I deal with this?

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Fwd: mencoder burns in subtitles instead of ripping them to file
by Artem Meshbeyn 16 Dec '11

16 Dec '11

OOPS! Thunderbird attached the wrong file first, sorry... I hope, it doesn't get posted... Hello, I've written a script to rip DVDs with mencoder years ago and haven't used it anymore for 2-3 years until now. Now it's burning the subtitles into the video file instead of ripping them to .idx/.sub files. I'm guessing, the parameter syntax has changed, but I couldn't find anything on the web or find help on IRC/in the manual. I'm attaching my script. Sorry for bad code etc, I wrote it when I just began learning how to write scripts and changed it a couple of times ;) Regards ptero PS. I know, the parameters I use are sub-optimal, but I don't know much about codecs and mplayer's parameters (even after "RTFMing" a lot) and just copied it from somewhere. (If someone could suggest another parameter string, for faster encoding with pretty much the same quality, I would be very thankful, but that's another issue ;))

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