March 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

4 3

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!

5 28

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

3 9

mencoder -oac copy and ac3
by Mike Castle 21 Mar '12

21 Mar '12

I'd been happily using a mencoder I built from tip a few months ago. Recently I updated and something broke. Of course, I didn't capture what version I was using before (if svn has that kind of history, I'd dig it out). Anyway, from researching the problem, it appears this may fall into the realm of ``This was never supported and if it worked at all it was by accident; consider yourself lucky that it worked that long.'' If so, then I won't bother trying to figure out when the error was introduced. In some hits I've seen, it looks like trying to use -oac copy with AC3 was unsupported, but I think those were posted prior to me having an actual working binary at some point. So, onto the error. I have a vob file ripped from a DVD. If I try to do something like: mencoder -quiet -endpos 00:03:00 -oac copy -ovc copy -o a.avi a.vob I get this: MEncoder SVN-r34790-4.6 (C) 2000-2012 MPlayer Team success: format: 0 data: 0x0 - 0x41bac000 libavformat version 54.2.100 (internal) MPEG-PS file format detected. VIDEO: MPEG2 720x480 (aspect 3) 29.970 fps 5726.0 kbps (715.8 kbyte/s) [V] filefmt:2 fourcc:0x10000002 size:720x480 fps:29.970 ftime:=0.0334 ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders libavcodec version 54.6.100 (internal) AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000) Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3) ========================================================================== videocodec: framecopy (720x480 24bpp fourcc=10000002) audiocodec: framecopy (format=2000 chans=2 rate=48000 bits=16 B/s=24000 sample-1) 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. demux_mpg: 24000/1001fps progressive NTSC content detected, switching framerate. Too many video packets in the buffer: (4096 in 8278781 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. Too many video packets in the buffer: (4096 in 8275684 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. Too many video packets in the buffer: (4096 in 8279156 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. Too many video packets in the buffer: (4096 in 8271258 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. Too many video packets in the buffer: (4096 in 8277435 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. Too many video packets in the buffer: (4096 in 8275056 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. Too many video packets in the buffer: (4096 in 8273038 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. Too many video packets in the buffer: (4096 in 8278307 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. Too many video packets in the buffer: (4096 in 8277483 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. Too many video packets in the buffer: (4096 in 8274280 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. Writing index... Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Video stream: 6426.393 kbit/s (803299 B/s) size: 144604416 bytes 180.013 secs 3946 frames Audio stream: 192.000 kbit/s (24000 B/s) size: 3962400 bytes 165.100 secs In watching a.avi, audio looks like the right speed, but the video is slow. In particular, I can tell that an scene change which should happen at 2:30 is delayed until 2:45. This is consistent with doing the whole track, and independent of using -ovc copy or something other codec. If I use -oac pcm, everything works fine, but of course the audio track is then large. In trying some random prebuilt versions that I can find in the Debian archive, I can verify that this worked as of r31918 and failing with r34728. Some maybe useful information: $ mplayer -frames 0 -identify a.vob MPlayer SVN-r34790-4.6 (C) 2000-2012 MPlayer Team Playing a.vob. libavformat version 54.2.100 (internal) ID_VIDEO_ID=0 ID_AUDIO_ID=128 MPEG-PS file format detected. VIDEO: MPEG2 720x480 (aspect 3) 29.970 fps 5726.0 kbps (715.8 kbyte/s) Load subtitles in ./ ID_FILENAME=a.vob ID_DEMUXER=mpegps ID_VIDEO_FORMAT=0x10000002 ID_VIDEO_BITRATE=5726000 ID_VIDEO_WIDTH=720 ID_VIDEO_HEIGHT=480 ID_VIDEO_FPS=29.970 ID_VIDEO_ASPECT=0.0000 ID_AUDIO_FORMAT=8192 ID_AUDIO_BITRATE=0 ID_AUDIO_RATE=0 ID_AUDIO_NCH=0 ID_START_TIME=0.22 ID_LENGTH=7541.36 ID_SEEKABLE=1 ID_CHAPTERS=0 ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family libavcodec version 54.6.100 (internal) Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2) ========================================================================== ID_VIDEO_CODEC=ffmpeg2 ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000) ID_AUDIO_BITRATE=192000 ID_AUDIO_RATE=48000 ID_AUDIO_NCH=2 Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3) ========================================================================== AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample) ID_AUDIO_CODEC=ffac3 Starting playback... Exiting... (End of file) ID_EXIT=EOF Output from an older version that works: $ LD_LIBRARY_PATH=/home/nexus/t/menc/usr/lib /home/nexus/t/menc/usr/bin/mencoder -endpos 00:03:00 -quiet -oac copy -ovc copy -o a.avi a.vob MPlayer SVN-r31918 (C) 2000-2010 MPlayer Team success: format: 0 data: 0x0 - 0x41bac000 MPEG-PS file format detected. VIDEO: MPEG2 720x480 (aspect 3) 29.970 fps 5726.0 kbps (715.8 kbyte/s) [V] filefmt:2 fourcc:0x10000002 size:720x480 fps:29.970 ftime:=0.0334 ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000) Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3) ========================================================================== videocodec: framecopy (720x480 24bpp fourcc=10000002) audiocodec: framecopy (format=2000 chans=2 rate=48000 bits=16 B/s=24000 sample-1) 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. demux_mpg: 24000/1001fps progressive NTSC content detected, switching framerate. Writing index... Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Video stream: 7072.976 kbit/s (884121 B/s) size: 159153600 bytes 180.013 secs 4340 frames Audio stream: 192.000 kbit/s (24000 B/s) size: 4320000 bytes 180.000 secs So, before I start bisecting changes, is this something that SHOULD work? If so, would it be more likely to be a problem with mplayer or ffmpeg? Or should I just sync both to the same various points in time and rebuild for testing purposes? I think that when I build mplayer and friends, it resyncs ffmpeg, right? Any hints for pinning? Any other recommended techniques for testing? Thanks, mrc

4 6

motion estimation across different codecs
by Adrian Ulges 06 Mar '12

06 Mar '12

Hi, I have a question regarding motion estimation in mencoder - I have videos from two different sources/websites, encoded with different codecs (for more info, see the output of "mplayer -identify" below). I observed that the distribution of the motion compensation vectors across both sources is very different (which may not be surprising): Videos from source 2 tend to have a lot more purely horizontal/vertical motion vectors (i.e., either v_x or v_y is usually zero), while videos from source 2 contain more diverse motion vectors. This is bad, because I want to do some fancy machine learning on these motion vectors. I was hoping to get rid of this effect (i.e., to make the general distributions of motion vectors from the two sources more similar) by transcoding all input videos with the same codec, using the following mencoder call: mencoder input.avi -ovc xvid -xvidencopts vhq=3:bitrate=700:me_quality=3:nogmc:max_bframes=0:noqpel -vf scale=-10:240 -o output.avi Unfortunately, this call did not solve my problem - the distribution of motion vectors from source 1 remains "strange". My question is: why is this? (I have two guesses) Option 1: The input quality is so low (in terms of blockiness) that motion estimation cannot really find new motion estimates Option 2: mencoder inherently uses the motion guess from the input data and is biased towards it (in which case: is there a way to get rid of this)? If anyone is interested, I can also post more detailed information (like plots of the motion vectors) - thanks a lot in advance! adrian SOURCE 1: ========= libavformat file format detected. ID_AUDIO_ID=0 ID_AID_0_LANG=und [lavf] stream 0: audio (aac), -aid 0, -alang und ID_VIDEO_ID=0 [lavf] stream 1: video (h264), -vid 0 VIDEO: [H264] 480x272 24bpp 25.000 fps 361.4 kbps (44.1 kbyte/s) Clip info: major_brand: isom ID_CLIP_INFO_NAME0=major_brand ID_CLIP_INFO_VALUE0=isom minor_version: 1 ID_CLIP_INFO_NAME1=minor_version ID_CLIP_INFO_VALUE1=1 compatible_brands: isomavc1 ID_CLIP_INFO_NAME2=compatible_brands ID_CLIP_INFO_VALUE2=isomavc1 copyright: ID_CLIP_INFO_NAME3=copyright ID_CLIP_INFO_VALUE3= copyright-eng: ID_CLIP_INFO_NAME4=copyright-eng ID_CLIP_INFO_VALUE4= ID_CLIP_INFO_N=5 ID_FILENAME=00ZEEKT5GFOBDSSIBV7F-0.mp4 ID_DEMUXER=lavfpref ID_VIDEO_FORMAT=H264 ID_VIDEO_BITRATE=361392 ID_VIDEO_WIDTH=480 ID_VIDEO_HEIGHT=272 ID_VIDEO_FPS=25.000 ID_VIDEO_ASPECT=1.7647 ID_AUDIO_FORMAT=MP4A ID_AUDIO_BITRATE=63992 ID_AUDIO_RATE=22050 ID_AUDIO_NCH=2 ID_START_TIME=0.00 ID_LENGTH=317.56 ID_SEEKABLE=1 ID_CHAPTERS=0 ========================================================================== Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding) AUDIO: 22050 Hz, 2 ch, s16le, 64.0 kbit/9.07% (ratio: 7999->88200) ID_AUDIO_BITRATE=63992 ID_AUDIO_RATE=22050 ID_AUDIO_NCH=2 Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio)) ========================================================================== SOURCE 2: ========= libavformat file format detected. ID_VIDEO_ID=0 [lavf] stream 0: video (h264), -vid 0 ID_AUDIO_ID=0 [lavf] stream 1: audio (aac), -aid 0 VIDEO: [H264] 320x240 0bpp 24.000 fps 398.7 kbps (48.7 kbyte/s) Clip info: metadatacreator: Yet Another Metadata Injector for FLV - Version 1.8 ID_CLIP_INFO_NAME0=metadatacreator ID_CLIP_INFO_VALUE0=Yet Another Metadata Injector for FLV - Version 1.8 hasKeyframes: true ID_CLIP_INFO_NAME1=hasKeyframes ID_CLIP_INFO_VALUE1=true hasVideo: true ID_CLIP_INFO_NAME2=hasVideo ID_CLIP_INFO_VALUE2=true hasAudio: true ID_CLIP_INFO_NAME3=hasAudio ID_CLIP_INFO_VALUE3=true hasMetadata: true ID_CLIP_INFO_NAME4=hasMetadata ID_CLIP_INFO_VALUE4=true canSeekToEnd: true ID_CLIP_INFO_NAME5=canSeekToEnd ID_CLIP_INFO_VALUE5=true duration: 1196 ID_CLIP_INFO_NAME6=duration ID_CLIP_INFO_VALUE6=1196 datasize: 72839569 ID_CLIP_INFO_NAME7=datasize ID_CLIP_INFO_VALUE7=72839569 videosize: 59933989 ID_CLIP_INFO_NAME8=videosize ID_CLIP_INFO_VALUE8=59933989 framerate: 24 ID_CLIP_INFO_NAME9=framerate ID_CLIP_INFO_VALUE9=24 videodatarate: 389 ID_CLIP_INFO_NAME10=videodatarate ID_CLIP_INFO_VALUE10=389 videocodecid: 7 ID_CLIP_INFO_NAME11=videocodecid ID_CLIP_INFO_VALUE11=7 width: 320 ID_CLIP_INFO_NAME12=width ID_CLIP_INFO_VALUE12=320 height: 240 ID_CLIP_INFO_NAME13=height ID_CLIP_INFO_VALUE13=240 audiosize: 12584684 ID_CLIP_INFO_NAME14=audiosize ID_CLIP_INFO_VALUE14=12584684 audiodatarate: 79 ID_CLIP_INFO_NAME15=audiodatarate ID_CLIP_INFO_VALUE15=79 audiocodecid: 10 ID_CLIP_INFO_NAME16=audiocodecid ID_CLIP_INFO_VALUE16=10 audiosamplerate: 3 ID_CLIP_INFO_NAME17=audiosamplerate ID_CLIP_INFO_VALUE17=3 audiosamplesize: 1 ID_CLIP_INFO_NAME18=audiosamplesize ID_CLIP_INFO_VALUE18=1 stereo: true ID_CLIP_INFO_NAME19=stereo ID_CLIP_INFO_VALUE19=true filesize: 72851432 ID_CLIP_INFO_NAME20=filesize ID_CLIP_INFO_VALUE20=72851432 lasttimestamp: 1196 ID_CLIP_INFO_NAME21=lasttimestamp ID_CLIP_INFO_VALUE21=1196 lastkeyframetimestamp: 1196 ID_CLIP_INFO_NAME22=lastkeyframetimestamp ID_CLIP_INFO_VALUE22=1196 lastkeyframelocation: 72851412 ID_CLIP_INFO_NAME23=lastkeyframelocation ID_CLIP_INFO_VALUE23=72851412 ID_CLIP_INFO_N=24 ID_FILENAME=00E18ATBBNVURHJR7C5M-0.flv ID_DEMUXER=lavfpref ID_VIDEO_FORMAT=H264 ID_VIDEO_BITRATE=398696 ID_VIDEO_WIDTH=320 ID_VIDEO_HEIGHT=240 ID_VIDEO_FPS=24.000 ID_VIDEO_ASPECT=1.3000 ID_AUDIO_FORMAT=MP4A ID_AUDIO_BITRATE=80384 ID_AUDIO_RATE=44100 ID_AUDIO_NCH=2 ID_START_TIME=0.00 ID_LENGTH=1196.25 ID_SEEKABLE=1 ID_CHAPTERS=0 ========================================================================== Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding) AUDIO: 44100 Hz, 2 ch, s16le, 80.4 kbit/5.70% (ratio: 10048->176400) ID_AUDIO_BITRATE=80384 ID_AUDIO_RATE=44100 ID_AUDIO_NCH=2 Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio)) ========================================================================== -- -- Dr. Adrian Ulges German Research Center for Artificial Intelligence (DFKI) Tel: +49 631 20575 4190 Mail: adrian.ulges(a)dfki.de Web: www.dfki.uni-kl.de/~ulges ------------------------------------------------------------- Deutsches Forschungszentrum fuer Kuenstliche Intelligenz GmbH Trippstadter Strasse 122, D-67663 Kaiserslautern, Germany Geschaeftsfuehrung: Prof. Dr. Dr. h.c. mult. Wolfgang Wahlster (Vorsitzender) Dr. Walter Olthoff Vorsitzender des Aufsichtsrats: Prof. Dr. h.c. Hans A. Aukes Amtsgericht Kaiserslautern, HRB 2313 -------------------------------------------------------------

2 1

converting Geovision AVI files with mencoder
by Ed Ravin 05 Mar '12

05 Mar '12

I'm new to mencoder and mplayer. I am trying to convert Geovision AVI files (from a CCTV system) into MPEG4 or any other format that can be played without needing access to Geovision's software. I'm using Ubuntu 10.10 (x86, 32 bit) and MPlayer 1.0rc4-4.4.5 from the Maverick repositories. The Geovision files can be viewed with mplayer without any problems. But when I try to use mencoder to convert or copy out the video, I get "duplicate frame" errors as shown below in the sample attempt to extract a few seconds of video. An output file is created, but it is always 4108 bytes in size and contains no video. Two listings below - first, the errors from mencoder, and after that the output from mplayer when it successfully plays the Geovision file. Any suggestions on how to proceed? Thanks, -- Ed -------------------------------------------------- $ mencoder -ni -ovc copy -oac copy -ss 400 -endpos 2 testin.avi -o testout.avi MEncoder 1.0rc4-4.4.5 (C) 2000-2010 MPlayer Team success: format: 0 data: 0x0 - 0x168ee00 AVI file format detected. [aviheader] Video stream found, -vid 0 [aviheader] Audio stream found, -aid 2 Badly interleaved AVI file detected - switching to -ni mode... AVI: No audio stream found -> no sound. VIDEO: [GEOV] 320x240 24bpp 30.000 fps 270.3 kbps (33.0 kbyte/s) [V] filefmt:3 fourcc:0x564F4547 size:320x240 fps:30.000 ftime:=0.0333 ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 8000 Hz, 1 ch, u8, 64.0 kbit/100.00% (ratio: 8000->8000) Selected audio codec: [pcm] afm: pcm (Uncompressed PCM) ========================================================================== videocodec: framecopy (320x240 24bpp fourcc=564f4547) audiocodec: framecopy (format=1 chans=1 rate=8000 bits=8 B/s=8000 sample-1) Pos: 0.7s 21f (41%) 0.00fps Trem: 0min 0mb A-V:-0.067 [0:0] 1 duplicate frame(s)! Pos: 1.1s 31f (41%) 0.00fps Trem: 0min 0mb A-V:-0.067 [182:0] 1 duplicate frame(s)! Pos: 1.4s 41f (41%) 0.00fps Trem: 0min 0mb A-V:-0.067 [171:0] 1 duplicate frame(s)! Pos: 1.8s 51f (41%) 0.00fps Trem: 0min 0mb A-V:-0.067 [165:0] 1 duplicate frame(s)! Writing index...57f (41%) 0.00fps Trem: 0min 0mb A-V:-0.053 [161:0] Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Video stream: 161.532 kbit/s (20191 B/s) size: 41056 bytes 2.033 secs 57 frames Audio stream: -nan kbit/s (-2147483648 B/s) size: 0 bytes 0.000 secs -------------------------------------------------- $ mplayer -ss 400 -endpos 2 testin.avi MPlayer 1.0rc4-4.4.5 (C) 2000-2010 MPlayer Team mplayer: could not connect to socket mplayer: No such file or directory Failed to open LIRC support. You will not be able to use your remote control. Playing testin.avi. AVI file format detected. [aviheader] Video stream found, -vid 0 [aviheader] Audio stream found, -aid 2 Badly interleaved AVI file detected - switching to -ni mode... AVI: No audio stream found -> no sound. VIDEO: [GEOV] 320x240 24bpp 30.000 fps 270.3 kbps (33.0 kbyte/s) open: No such file or directory [MGA] Couldn't open: /dev/mga_vid open: No such file or directory [MGA] Couldn't open: /dev/mga_vid [VO_TDFXFB] Can't open /dev/fb0: Permission denied. [VO_3DFX] Unable to open /dev/3dfx. Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory [vdpau] Error when calling vdp_device_create_x11: 1 ========================================================================== Opening video decoder: [vfw] Win32/VfW video codecs Loading codec DLL: 'GeoCodec.dll' Loaded DLL driver GeoCodec.dll at 10000000 [PP] Using codec's postprocessing, max q = 9. Could not find matching colorspace - retrying with -vf scale... Opening video filter: [scale] Opening video filter: [flip] Movie-Aspect is undefined - no prescaling applied. [swscaler @ 0x940ab70]using unscaled bgr24 -> yuv420p special converter VO: [xv] 320x240 => 320x240 Planar YV12 Selected video codec: [geov] vfm: vfw (GeoCodec) ========================================================================== ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 8000 Hz, 1 ch, u8, 64.0 kbit/100.00% (ratio: 8000->8000) Selected audio codec: [pcm] afm: pcm (Uncompressed PCM) ========================================================================== AO: [pulse] 8000Hz 1ch u8 (1 bytes per sample) Starting playback... A: 0.0 V: 402.0 A-V:-402.000 ct:-60.100 12061/12061 8% 12% 0.0% 0 0 Exiting... (End of file)

2 3

Questions about fps and synch for vintage QuickTime movies
by Mike Spreitzer 02 Mar '12

02 Mar '12

I am retiring some old computer equipment, and want to transcode some old QuickTime movies into a modern format. These movies were found on removable media with dates in the spring of 1996. I think they were made on my PowerMac 7500/100, on those dates or not many years before. That would be with System 7.5.something. I think I made them using some standard recording software of such Macs. I think the video source was a S-VHS camcorder, connected to the Mac via a S-video cable; the audio came in through the Mac's microphone or an external microphone. In Mac filesystem terms, these movies have type/creator of MooV/ttxt. Each has a small resource fork, containing just one resource (of type MooV), and a large data fork. I have copied these files to modern systems, losing the resource fork along the way. I can play them with mplayer and QuickTime 7 on Windows Vista and MacOS 10.6 (also the current QuickTime on MacOS 10). Oddly, mplayer and QuickTime disagree about the frame rate. I will discuss one example movie. On both MacOS 10 and Windows Vista, QuickTime 7's inspector says the movie's frame rate is 27.16. On both MacOS 10 and Windows Vista, mplayer says the movie's frame rate is 30.00. In all four cases, when I play the move the sound and video are in sync. I used a stopwatch to time the playback time between two events in the movie (it is short), and got the same amount (33 seconds) in each of those four cases. Why are these two pieces of software making different claims about FPS? When I try to transcode, using mencode, the sound and video get out of sync. I am guessing that understanding what is going on with the source will help. Thanks, Mike

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