Post by richardhttp://youtu.be/7PCkvCPvDXk
I want to keep this video but of the programs I have, none will download
it.
I tried a screen capture. Got the video, but no audio.
What programs _will_ download this video?
Tried a couple of online services but they use a java applet and it ain't
working for me even though I havd java installed.
I got screen capture with this, but only at around 20FPS or so.
And, it has sound, because Stereo Mix works on WinXP :-) Stereo
Mix gets progressively harder to set up, the more modern the
OS. Maybe on Windows 8 you'd have to use a microphone :-)
ffmpeg -offset_x 0 -offset_y 192 -video_size 1024x768 -framerate 60
-f gdigrab -i desktop -f dshow -sample_rate 44100 -i audio="SoundMAX HD Audio"
-vcodec mjpeg -acodec pcm_s16le D:\out.avi
The command needs the "name" of the sound system.
FFMPEG has some options to help with that, to get the name right.
The second command here, tells me a "capture pin" is available
on that particular sound device.
ffmpeg -list_devices true -f dshow -i dummy # Name of sound...
ffmpeg -f dshow -list_options true -i audio="SoundMAX HD Audio" #
Recording at 60FPS isn't all that clever, but I was interested
in the "jitter" aspects of capture. And it's as bad as I feared.
The program just doesn't take snapshots of the screen at
regular intervals. There is too much variation for my tastes.
This does not hurt the quality of the video capture particularly,
and is just a technical issue. My plan was to do some sort
of down-sample of the framerate, to arrive at the "as-delivered"
frame rate. Otherwise, ffmpeg has no way to know what the frame
rate of the video is. Camstudio is potentially better at that
sort of thing (has an adaptive option that may not be
working properly...).
*******
This is the build I used.
http://ffmpeg.zeranoe.com/builds/
Latest Zeranoe FFmpeg Build Version: git-f6bb2cd (2014-10-16)
32-bit Downloads <--- 64-bit Downloads
Download FFmpeg git-f6bb2cd 32-bit Static <--- all in one FFMPEG.exe
The "static", is to get a build where all the libraries are inside
the program. To make it as portable as possible.
*******
CamStudio would be nicer, but the 4GB file size limit on output
hasn't been fixed. CamStudio has nice controls for selecting
what to capture, which beats that "Offset" shit above all to hell.
*******
Screen capture is largely a waste of time, but I
expect you knew that... It's like building a working
fusion reactor in your basement.
Paul