i want to create a video from a image i used following code
shell_exec("avconv -f image2 -r 50 testimage.jpg output.mpg");
But when i trying to playing output video it shows stream contains no data
The avconv manual says
For creating a video from many images:
avconv -f image2 -i foo-%03d.jpeg -r 12 -s WxH foo.avi
The syntax foo-%03d.jpeg specifies to use a decimal number composed of three digits padded with zeroes to express the sequence number.
There is a -s WxH in that line which is missing from your code. Maybe that is the cause.
-s WxH is used to specify the size of the video, W - width and H - height. Here is a list of formats supported
On increasing the playback time, again the manual says
-t duration (output)Stop writing the output after its duration reaches duration. duration may be a number in seconds, or in
hh:mm:ss[.xxx]form.