FAQ Database Discussion Community

Is it possible to have two images in a single frame in motion jpeg?

I have a quick time video file, video stream is in motion jpeg format, I extract every frame in the file with ffmpeg -i a.mov -vcodec copy -f image2 %d.jpg I found that in every jpeg file, there are actually two FFD8 marker, which means there are actually two images...

Incompatible pixel format YUV420P with mjpeg

I am using ffmpeg to make a video from jpeg images using mjpeg codec. I use this command ffmpeg -i frame%d.jpg -c:v mjpeg -pix_fmt yuv420p -q:v 1 -y out.mp4 and I have this warning the yuvj420p was chosen instead. After reading about that pixel format, I found its deprecated to...

packing MJPEG into MPEG-TS

I have algo that packing RAW h264 into MPEG-TS. But I need also to pack MJPEG. Whats PES stream_type id I need? For h264 it is 0x1b. Or it is impossible to pack MJPEG and streaming it via UDP? Thanks.

V4l2 MJPEG Chroma Subsumpling

My cam gives me jpeg with chroma sub-sampling 4:2:2, but I need 4:2:0. Can I change MJPEG default chroma sub-sampling with v4l2? ...

Safari open and close img MIME type multipart / x-mixed-replace streaming on demand

testing a mobile Safari web application, I find that I have an image in your tag img src changes dynamically. This src reference to a url that generates a streaming mjpeg with MIME type multipart / x-mixed-replace. Changing the src notice that the browser does not close the connection to...