looks like that writes raw video (no compression at all, kinda like a .bmp) but there is no header, so no description of size or colorspace, which we kinda need to know. I got something:
transcode -i v4l.out -x raw,null -g 640x480 -o test -y ffmpeg,null -F mpeg1video however, I am going to ask again: Why not transcode right from the /dev/video device? I don't see the point in creating the v4l.out file. I am not sure how to get transcode to work with vivi, but I have gotten it to work with other v4l2 devices. Carl K Wasilios Goutas wrote: > Hi, > > I created the file writing an application wich uses libavcap > http://sourceforge.net/projects/libavcap > to read data from video devices. > I use the linux dummy driver vivi wich creates test video output wich can be > viewed e.g. with xawtv direct from device, but I was not able to record it as > avi because xawt crashes. > > I have written 1 sec of the data I got to a file. You can download it from > www.goutas.de/v4l/v4l.out it has a size of 11MB > a tgz Version can also downloaded > www.goutas.de/v4l/v4l.out.tgz it's only 90kB > > bye > wasili > > Am Donnerstag 20 November 2008 22:51:02 schrieb Carl Karsten: >> Wasilios Goutas wrote: >>> Hi, >>> >>> tcprobe returns >>> [tcprobe] unknown file type >>> [tcprobe] filetype/codec not yet supported by 'transcode' >>> >>> Am Montag 17 November 2008 02:56:46 schrieb Carl Karsten: >>>> Wasilios Goutas wrote: >>>>> Hi, >>>>> >>>>> I wrote an smal progam which reads video from a linux v4l2 device and >>>>> want to convert this file to an viewable format. >>>>> Can you please tell me which parameter I have to use to convert such >>>>> file to e.g. avi or mp4 files? >>>> Here is what I use to read from a v4l device and write to .avi >>>> >>>> transcode -x v4l,null -V rgb24 -i /dev/video1 -y ffmpeg -F h263p -g >>>> 1024x768 -o test.avi >>>> >>>> -x v4l,null defines the input video and audio format. >>>> -i is the input. >>>> >>>> Change the -x v4l to v4l2, and you might be able to read right from the >>>> driver. >>> but, I want to read a file :( >>> >>> Any Ideas, how I can get the file converted to avi, pm4 ore whatever? >>> >>> >>> bye >>> wasili >>> >>>> "viewable format" is kinda vague, but try removing the -x option and >>>> maybe it will guess right. >>>> >>>> to see what format a file is: >>>> tcprobe -k filename >>>> >>>> Carl K >> convert requires decoding/understanding the source, which currently we >> don't. >> >> How did you create the file? >> >> Does anything currently play the file? >> >> Carl K > > >
