Hi, On Mon, 2006-09-11, Richard Cooper wrote: > lavtrans -f i -o %06d.jpg +n movie.avi [..] > The JPEG images don't seem to be readable: > [EMAIL PROTECTED]:~/video/swing_jump$ convert 000000.jpg same.jpg > convert: Huffman table 0x00 was not defined `000000.jpg'. > No other application wants to deal with the images either.
The video probably comes from a cheap photo-camera, right? To save space (ahem), they lack huffman tables. You can read them by including default huffman tables, which is what we do. Other applications, however, don't. A possible solution is to regenerate the images, either by decompression and recompression into a lossless format (to prevent further quality loss), or back into JPEG with huffman tables. To do this, run: lav2yuv +n video.avi | yuv2lav -f i -o %06d.jpg or lav2yuv +n video.avi | yuv2pnm [..] Those image files can then be read by imagemagick (convert) or the GIMP. > I can't get the sound to dump correctly either: > lavtrans -f w -o audio.wav +n movie.avi > [EMAIL PROTECTED]:~/video/swing_jump$ play audio.wav > sox: Failed reading audio.wav: WAV file has unknown format type of 100 > > The problem there is just a two byte integer at offset 0x14 which is 0x100 > when it should be 1. Perhaps the endianess is incorrect. I hope someone else can comment here. > I'm also not sure what to make of this "+n" option that seems to be > required to make it work. MJPEGtools is primarily aimed at TV/video sources, so we handle video in NTSC or PAL/SECAM format. If it isn't, we assume that to be problematic, because any tools make assumptions on this. However, we don't adapt framerate (i.e. a NTSC video isn't re-framerated to 30, neither is a PAL video re-framerated to 25; this is just for things such as color correction and other such things). So it should be fine for your purposes. Cheers, Ronald ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
