[MEncoder-users] duplicate frames - shortening video?
hans at netupgrades.com
hans at netupgrades.com
Tue Jun 12 00:50:46 CEST 2012
Laine Lee!
Thanks very much! I tried it as well and also got 2:53!
Big thanks for help tracking and testing this. Ill play with the
options now more and fine tune it.
Much appreciated to all. --hans
"L. Lee" <llee040 at sbcglobal.net> wrote:
> You might try adding "-mc" and increasing the values to see if you
> can get what you want. I got a 2:53 duration on your sample by using
> "-mc 1" (the original has a duration of 2:58, OMM).
>
> Laine Lee
>
>
> On 6/7/12 6:31 PM, "hans at netupgrades.com" <hans at netupgrades.com>
> wrote:
>
> > Hi Steven and thanks for the help!
> >
> > Steven Miller <srmj.ml at gmail.com> wrote:
> >
> >> Have you tested the source? Is all well on that end?
> >
> > Yes - the source scrolls fine.
> >
> >> Couple of things,
> >>
> >> What is the source video codec?
> >
> > Ogg vorbis?
> >
> >> Is the video and or audio cbr or vbr or a mix (if mixing the
> >> two is even possible).
> >
> > I am not sure on this. I have posted info from mencoder below.
> >
> >> Are you sure on the frame rate?
> >
> > I am not sure, but I have tried different frame rates w/ no
> > difference.
> >
> >> Is it telecene? If so I believe there are instances where
> >> attempting to set the frame rate could be ignored during encoding
> >> without addressing the telecine.
> >> If it were telecine, a filter combo something like '-vf
> >> pullup,softskip,harddup' would be needed.
> >
> > I dont think it is telecine.
> >
> >> I see your recompressing audio. Going from mp3 to mp3. Perhaps you
> >> can use '-oac copy' for the encoding portion. Then using mplayer go
> >> back to the original source file, '-ao
> >> pcm:waveheader:file=foo.wav'. Once you have your wav file, use
> >> lame to rencode the audio.
> >>
> >> Demux the video using the tool(s) of choice. Then remux the video
> >> and audio.
> >>
> >> A very round about way to do it, but it's worked for me a number of
> >> times.
> >>
> >> Either way I'm betting '-ofps' will most likely be needed to
> >> address the 'Duplicate Frame' messages.
> >
> > Yes - I have just tried that, too.
> >
> >> Again, I apologize if I've missed a resolution or am asking already
> >> answered questions.
> >
> > No problem - Here is what I wrote to Lobster answering his
> > questions.
> >
> > Ive included the source files.
> >
> > Thank you very much for helping Steven! :) --Hans
> >
> > From: <hans at netupgrades.com>
> > To: Lobster <lobo at lobs.sytes.net>
> > Subject: Re: [MEncoder-users] duplicate frames - shortening video?
> > Date: Wed, 6 Jun 2012 00:13:21 -0500
> > X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.10; i486-pc-linux-gnu)
> >
> > Hey Lobster,
> >
> > Thanks for the help. Big thanks! :)
> >
> > I just did a new test from a different, but similar out.ogv and got
> > the same sort of shortening frames effect when processed through
> > mencoder.
> >
> > Below I have pasted the command you just asked me to try > dev/null
> >
> > Below that I have pasted the results of the mencoder command you
> > initially gave to me w/ the ofps flag.
> >
> > Also, I have posted both the source and the mencoded test.avi
> > online.
> >
> > [...]
> >
> > Here are the vids online:
> >
> > http://nukene.ws/sites/nukene.ws/files/out.ogv
> > http://nukene.ws/sites/nukene.ws/files/test.avi
> > http://nukene.ws/sites/nukene.ws/files/breathe-out_alpha.mp3
> >
> > Very kind of you and much appreciated, Lobster.
> >
> > I like mencoder a lot! :) --Hans
> >
> >
> > mencoder -ovc copy -nosound -o /dev/null out.ogv
> > MEncoder svn r34540 (Debian), built with gcc-4.7 (C) 2000-2012
> > MPlayer Team success: format: 0 data: 0x0 - 0x4d725c
> > libavformat version 53.21.0 (external)
> > Mismatching header version 53.19.0
> > libavformat file format detected.
> > [ogg @ 0xb6b8efa0]max_analyze_duration reached
> > [lavf] stream 1: video (theora), -vid 0
> > VIDEO: [theo] 1376x816 0bpp 15.000 fps 0.0 kbps ( 0.0
> > kbyte/s) [V] filefmt:44 fourcc:0x6F656874 size:1376x816
> > fps:15.000 ftime:=0.0667 videocodec: framecopy (1376x816 0bpp
> > fourcc=6f656874) 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: 24.3s 365f (100%) 0.00fps Trem:
> > 0min 4mb A-V:0.000 [1663:0] Writing index...
> > Writing header...
> > ODML: Aspect information not (yet?) available or unspecified, not
> > writing vprp header.
> >
> > Video stream: 1659.014 kbit/s (207376 B/s) size: 5046167 bytes
> > 24.333 secs 365 frames
> >
> > ====
> > Command line logging of original mencoder run:
> >
> > mencoder out.ogv -audiofile audio/breathe-out_alpha.mp3 -ovc lavc
> > -oac mp3lame -vf harddup -ofps 15 -o test.avi MEncoder svn r34540
> > (Debian), built with gcc-4.7 (C) 2000-2012 MPlayer Team success:
> > format: 0 data: 0x0 - 0x4d725c libavformat version 53.21.0
> > (external) Mismatching header version 53.19.0
> > libavformat file format detected.
> > [ogg @ 0xb6b73fa0]max_analyze_duration reached
> > [lavf] stream 1: video (theora), -vid 0
> > VIDEO: [theo] 1376x816 0bpp 15.000 fps 0.0 kbps ( 0.0
> > kbyte/s) Audio only file format detected.
> > BUG! Invalid demuxer type in new_demuxer(), big troubles ahead.[V]
> > filefmt:65536 fourcc:0x6F656874 size:1376x816 fps:15.000
> > ftime:=0.0667
> > ==========================================================================
> > Requested audio codec family [mpg123] (afm=mpg123) not available.
> > Enable it at compilation. Opening audio decoder: [ffmpeg]
> > FFmpeg/libavcodec audio decoders libavcodec version 53.35.0
> > (external) Mismatching header version 53.32.2 AUDIO: 44100 Hz, 2
> > ch, floatle, 192.0 kbit/6.80% (ratio: 24000->352800) Selected audio
> > codec: [ffmp3float] afm: ffmpeg (FFmpeg MPEG layer-3 audio)
> > ==========================================================================
> > Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1, osd:
> > 1, aspect: 0.000000, round: 1 Opening video filter: [harddup]
> > ==========================================================================
> > Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> > Selected video codec: [fftheora] vfm: ffmpeg (FFmpeg Theora)
> > ==========================================================================
> > MP3 audio selected.
> > Movie-Aspect is 1.69:1 - prescaling to correct movie aspect.
> > videocodec: libavcodec (1376x816 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: 0.1s 2f (17%) 0.00fps Trem: 0min
> > 0mb A-V:0.007 [0:0] [VD_FFMPEG] DRI failure.
> > Pos: 5.1s 76f (17%) 6.45fps Trem: 0min 7mb A-V:-0.138
> > [1967:205]
> >
> > 1 duplicate frame(s)!
> > Pos: 5.8s 86f (20%) 6.07fps Trem: 0min 7mb A-V:-0.138
> > [2020:207]
> >
> > 1 duplicate frame(s)!
> > Pos: 6.5s 96f (23%) 5.85fps Trem: 0min 7mb A-V:-0.138
> > [1918:210]
> >
> > 1 duplicate frame(s)!
> > Pos: 7.3s 106f (26%) 5.76fps Trem: 0min 6mb A-V:-0.138
> > [1763:211]
> >
> > 1 duplicate frame(s)!
> > Pos: 8.0s 116f (28%) 5.63fps Trem: 0min 6mb A-V:-0.138
> > [1646:213]
> >
> > 1 duplicate frame(s)!
> > Pos: 8.7s 126f (30%) 5.60fps Trem: 0min 6mb A-V:-0.138
> > [1571:213]
> >
> > 1 duplicate frame(s)!
> > Pos: 9.5s 136f (34%) 5.62fps Trem: 0min 5mb A-V:-0.138
> > [1504:214]
> >
> > 1 duplicate frame(s)!
> > Pos: 10.2s 146f (36%) 5.74fps Trem: 0min 5mb A-V:-0.138
> > [1448:212]
> >
> > 1 duplicate frame(s)!
> > Pos: 10.9s 156f (37%) 5.88fps Trem: 0min 5mb A-V:-0.138
> > [1392:210]
> >
> > 1 duplicate frame(s)!
> > Pos: 11.7s 166f (40%) 5.88fps Trem: 0min 5mb A-V:-0.138
> > [1345:208]
> >
> > 1 duplicate frame(s)!
> > Pos: 12.4s 176f (43%) 5.81fps Trem: 0min 5mb A-V:-0.138
> > [1313:207]
> >
> > 1 duplicate frame(s)!
> > Pos: 13.1s 186f (44%) 5.79fps Trem: 0min 5mb A-V:-0.138
> > [1266:205]
> >
> > 1 duplicate frame(s)!
> > Pos: 13.9s 196f (44%) 5.80fps Trem: 0min 5mb A-V:-0.138
> > [1207:204]
> >
> > 1 duplicate frame(s)!
> > Pos: 14.6s 206f (44%) 5.93fps Trem: 0min 5mb A-V:-0.138
> > [1153:202]
> >
> > 1 duplicate frame(s)!
> > Pos: 15.3s 216f (45%) 5.93fps Trem: 0min 5mb A-V:-0.138
> > [1120:201]
> >
> > 1 duplicate frame(s)!
> > Pos: 16.1s 226f (46%) 5.98fps Trem: 0min 5mb A-V:-0.138
> > [1104:201]
> >
> > 1 duplicate frame(s)!
> > Pos: 16.8s 236f (49%) 6.09fps Trem: 0min 5mb A-V:-0.138
> > [1143:202]
> >
> > 1 duplicate frame(s)!
> > Pos: 17.5s 246f (53%) 6.08fps Trem: 0min 5mb A-V:-0.138
> > [1147:203]
> >
> > 1 duplicate frame(s)!
> > Pos: 18.3s 256f (58%) 6.08fps Trem: 0min 5mb A-V:-0.138
> > [1175:203]
> >
> > 1 duplicate frame(s)!
> > Pos: 19.0s 266f (62%) 6.14fps Trem: 0min 5mb A-V:-0.138
> > [1168:203]
> >
> > 1 duplicate frame(s)!
> > Pos: 19.7s 276f (67%) 6.17fps Trem: 0min 4mb A-V:-0.138
> > [1177:202]
> >
> > 1 duplicate frame(s)!
> > Pos: 20.5s 286f (70%) 6.17fps Trem: 0min 4mb A-V:-0.138
> > [1146:202]
> >
> > 1 duplicate frame(s)!
> > Pos: 21.2s 296f (76%) 6.12fps Trem: 0min 4mb A-V:-0.138
> > [1146:201]
> >
> > 1 duplicate frame(s)!
> > Pos: 21.9s 306f (80%) 6.11fps Trem: 0min 4mb A-V:-0.138
> > [1125:201]
> >
> > 1 duplicate frame(s)!
> > Pos: 22.7s 316f (86%) 6.03fps Trem: 0min 4mb A-V:-0.138
> > [1124:201]
> >
> > 1 duplicate frame(s)!
> > Pos: 23.4s 326f (87%) 6.02fps Trem: 0min 4mb A-V:-0.138
> > [1093:201]
> >
> > 1 duplicate frame(s)!
> > Pos: 24.1s 336f (91%) 5.97fps Trem: 0min 4mb A-V:-0.138
> > [1083:202]
> >
> > 1 duplicate frame(s)!
> > Pos: 24.9s 346f (93%) 5.94fps Trem: 0min 4mb A-V:-0.138
> > [1068:203]
> >
> > 1 duplicate frame(s)!
> > Pos: 25.6s 356f (97%) 5.90fps Trem: 0min 4mb A-V:-0.138
> > [1067:203]
> >
> > 1 duplicate frame(s)!
> > Pos: 26.3s 365f (100%) 5.87fps Trem: 0min 3mb A-V:-0.131
> > [1059:203]
> >
> > Flushing video frames.
> > Writing index...
> > Writing header...
> > ODML: Aspect information not (yet?) available or unspecified, not
> > writing vprp header.
> >
> > Video stream: 1059.505 kbit/s (132438 B/s) size: 3478709 bytes
> > 26.267 secs 365 frames
> >
> > Audio stream: 204.025 kbit/s (25503 B/s) size: 682858 bytes
> > 26.776 secs
> >
> >> Steve
> >> On Jun 4, 2012 11:24 PM, <hans at netupgrades.com> wrote:
> >>
> >>> Thanks Lobster.
> >>>
> >>> Still I am getting a video of very fast scrolling down the page as
> >>> if mencoder has discarded these long scroll pauses as duplicates
> >>> and optimized the video by removing the duplicates.
> >>>
> >>> Anything else to try to preserve all the frames in the source vid?
> >>>
> >>> Thanks! :)
> >>>
> >>> Lobster <lobo at lobs.sytes.net> wrote:
> >>>
> >>>> On 5/06/2012 11:01 a.m., hans at netupgrades.com wrote:
> >>>>> Hi -
> >>>>>
> >>>>> Videos are being shortened (losing frames?).
> >>>>>
> >>>>> My source video is a desktop recording of me scrolling down a
> >>>>> web page, and I wait for a few seconds each time before I
> >>>>> scroll down further.
> >>>>>
> >>>>> I think mencoder is optimizing these "similar" frames and drops
> >>>>> them.
> >>>>>
> >>>>>
> >>>>> I have tried many variations to keep my long scroll pauses
> >>>>> intact:
> >>>>>
> >>>>> mencoder out.ogv -audiofile myfile.mp3 -ovc lavc -oac mp3lame
> >>>>> -fps 5 -o test.avi
> >>>>>
> >>>>> mencoder out.ogv -audiofile myfile.mp3 -ovc lavc -oac mp3lame
> >>>>> -fps 15 -o test.avi
> >>>>>
> >>>>> mencoder out.ogv -audiofile myfile.mp3 -ovc lavc -oac mp3lame
> >>>>> -fps 15 -vf harddup -o test.avi
> >>>>>
> >>>>> mencoder out.ogv -audiofile myfile.mp3 -ovc lavc -oac mp3lame
> >>>>> -vf harddup -o test.avi
> >>>>>
> >>>>> These are the type of messages I see:
> >>>>>
> >>>>> 1 duplicate frame(s)!
> >>>>> Pos: 10.9s 151f (93%) 16.10fps Trem: 0min 2mb
> >>>>> A-V:-0.133 [1406:210]
> >>>>>
> >>>>>
> >>>>> Each time, I see duplicate frames being dropped, and my video
> >>>>> is a very fast scrolling down the web page.
> >>>>>
> >>>>> I thought -vf harddup made it not lose frames?
> >>>>>
> >>>>> How do I keep the same video length as my source file?
> >>>>
> >>>> use -ofps to force the output frame rate.
> >>>> I.E `mencoder out.ogv -audiofile myfile.mp3 -ovc lavc -oac
> >>>> mp3lame -vf harddup -ofps 15 -o test.avi`
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> MEncoder-users mailing list
> >>>> MEncoder-users at mplayerhq.hu
> >>>> https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
> >>>
> >>> _______________________________________________
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> >>> https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
> >>>
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> >
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