Hi Guy,
AFAIK you can do
transcode -i somexvidfile.avi -p camfile_imaadpcm.wav -o camfile.avi -Z
320x240 -y ffmpeg,raw -F mjpeg
and maybe a -N 0x01 additionally.
BTW: the cameras from cannon and panasonic I had so far used only 8000 kHz.
Hope it helped!
Georg
On Monday 30 March 2009, Guy Hindell wrote:
> Hi there --- I guess this is a somewhat academic question, but...
>
> Can anyone tell me if and how transcode (perhaps via ffmpeg, avimerge
> etc.) can *encode* AVI files as mjpeg video with ima_adpcm audio? Why do
> I want to do this? Well, I'm curious to see whether I can create files
> in the same format as those produced by a Casio Exilim digital camera
> such that they can be copied to the SD card and the camera will play them.
>
> So far I can create files whose video content does play on the camera...
>
> transcode -i somexvidfile.avi -o camfile.avi -Z 320x240 -y ffmpeg -F mjpeg
>
> but whose audio is still the mp3 encoded 2 channel 44100Hz of the
> original. The target audio is (I think) 1 channel 22050Hz encoded as
> ima-adpcm. I've not been able to figure out how I can get ffmpeg to
> create such audio, or how I can get transcode to use ffmpeg to do it
> even if it could. However, the audio can be extracted like this...
>
> trasncode -i somexvidfile.avi -o camfile_pcm.wav -E 22050,0,1 -x
> null,raw -y wav
>
> and sox used to convert from pcm to ima_adpcm...
>
> sox camfile_pcm.wav -i camfile_imaadpcm.wav
>
> and an avi with video but no sound is easy enough to create.
>
> But... that's as far as I've got --- can transcode create an AVI that
> combines my camfile.avi and camfile_imaadpcm.wav?
>
> cheers
> guy
