On Wed, 7 Sep 2005 18:30:34 -0300 (ART) Arturo 'Buanzo' Busleiman wrote: > On Wed, 7 Sep 2005, Holly Bostick wrote: > > > Rar or Tar.gz or zip the file up and share it, or encode it down to an > > xvid (which will likely reduce the size at least somewhat, but anybody > > correct me if I'm wrong) and *then* rar/tar.gz/zip it up and share it. > > And how do I easily encode it down to an xvid?
your sample file shows the following with mplayer -identify: ASF file format detected. ID_AUDIO_ID=1 ID_VIDEO_ID=2 VIDEO: [WMV3] 320x240 24bpp 1000.000 fps 0.0 kbps ( 0.0 kbyte/s) ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders AUDIO: 32000 Hz, 2 ch, s16le, 32.0 kbit/3.12% (ratio: 4000->128000) Selected audio codec: [ffwmav2] afm:ffmpeg (DivX audio v2 (FFmpeg)) ========================================================================== ID_FILENAME=dd24_2005.wmv ID_VIDEO_FORMAT=WMV3 ID_VIDEO_BITRATE=0 ID_VIDEO_WIDTH=320 ID_VIDEO_HEIGHT=240 ID_VIDEO_FPS=1000.000 ID_VIDEO_ASPECT=0.0000 ID_AUDIO_CODEC=ffwmav2 ID_AUDIO_FORMAT=353 ID_AUDIO_BITRATE=32000 ID_AUDIO_RATE=32000 ID_AUDIO_NCH=2 ID_LENGTH=3232 ========================================================================== Opening video decoder: [dmo] DMO video codecs DMO dll supports VO Optimizations 0 1 DMO dll might use previous sample when requested GetOutput r=0x0 size:230400 align:1 StreamCount r=0x0 1 1 Decoder supports the following YUV formats: YV12 YUY2 UYVY YVYU Decoder is capable of YUV output (flags 0x1b) VDec: vo config request - 320 x 240 (preferred csp: Packed YUY2) VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is undefined - no prescaling applied. VO: [null] 320x240 => 320x240 Planar YV12 Selected video codec: [wmv9dmo] vfm:dmo (Windows Media Video 9 DMO) ========================================================================== Checking audio filter chain for 32000Hz/2ch/s16le -> 32000Hz/2ch/s16le... AF_pre: 32000Hz/2ch/s16le alsa-init: 1 soundcard found, using: default alsa: 32000 Hz/2 channels/4 bpf/43688 bytes buffer/Signed 16 bit Little Endian AO: [alsa] 32000Hz 2ch s16le (2 bps) Building audio filter chain for 32000Hz/2ch/s16le -> 32000Hz/2ch/s16le... Starting playback... Clearly the frames per second is misreported at 1000 (this seems a common problem with wmv files and ffmpeg/mplayer). However you can see that it has been coded down to 320x240 pixels. It is remarkably watchable, albeit I don't understand the language. Yu can use the above parameters to re-encode it with a variety of tools, you will have to do a little research as to what will work best. It will take a bit of cpu processing too! The possible tools are: ffmpeg mencoder (part of mplayer) transcode The common approach is to separate the audio and video channels, re-encode each of them to the required bitrate and size, and then mplex them back together again. There is no one tool or "right" approach. There is a lot of reading to do. avidemux does provide a gui which may be useful - it helps set up parameters for the various formats and ocdecs. It uses the same basic tools "under the hood" though. For a reasonably well documented script that does a similar thing, and may provide inspiration, see http://forums.gentoo.org/viewtopic.php?t=117709&highlight=codecs (this documents any2vob, which takes any old video file and converts it to a format suitable for burning to dvd. You are doing pretty much the opposite, but the steps and tools are the same.) > > -- > Buanzo > > -- > gentoo-user@gentoo.org mailing list -- Nick Rout <[EMAIL PROTECTED]> -- gentoo-user@gentoo.org mailing list
