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1answer
251 views

How to make avi (MJPEG codec) by avconv for iphone?

I try to make video from pack of jpg by avconv and open it on iphone. I make avi file using MJPEG by command: avconv -r 10 -i %06d.jpg -r 10 -vcodec mjpeg -qscale 1 out.avi Eveything is ok on my ...
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1answer
1k views

Fixing an unmuxed image/jpeg stream from webcam using gstreamer

I made a broken footage using the following pipeline: gst-launch-1.0 v4l2src ! filesink location=encode.mjpeg Somehow gstreamer can still play it back: gst-launch-1.0 filesrc location=encode.mjpeg ...
0
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1answer
509 views

Extracting jpeg images from mjpeg stream on terminal

I'm trying to extract jpeg images from an mjpeg stream. I've done a search and found a few sources, but those were extracting jpeg images from a mjpeg file, such as this one here. In my case, I don't ...
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2answers
950 views

What makes VLC and Google Chome succeed where MPlayer and OpenCV fail?

I have this MJPEG stream. When I open it with VLC or with Chrome, it works perfectly, and in both cases the stream starts instantly (or atleast within one second). However, with MPlayer, I get this ...
25
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3answers
10k views

Meaningful thumbnails for a Video using FFmpeg

FFmpeg can capture images from videos that can be used as thumbnails to represent the video. Most common ways of doing that are captured in the FFmpeg Wiki. But, I don't want to pick random frames at ...
3
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1answer
6k views

ffmpeg open webcam using YUYV but i want MJPEG

I need ffmpeg to open webcam (logitech c910) in MJPEG mode, because the webcam can give ~24 using MJPEG "protocol" and only ~10 fps using the YUYV. Can i choose between them using ffmpeg command line? ...
0
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2answers
2k views

Mjpeg recording with FFMPEG preserving time information

I am recording the MJPEG video from an IP camera and saving it to a file but the problem is that file's duration is way smaller than the actual recording time. Its around 9 seconds video for 2 minutes ...
1
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0answers
560 views

Having trouble reading a YUV video with mplayer/mencoder

I'm making some experiences with the YUV raw video format. This YUV video I created (with ppmtoy4m from mjpegtools, from a series of screenshots taken at 24 fps) plays OK with Totem, correct rate, ...
0
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1answer
848 views

Record mjpeg with ffmpeg

I want to record a mjpeg stream via ffmpeg, but as the framerate of the mjpeg is very unreliable the result video is at first to fast and the speed changes. The source i used to test is: ...
2
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1answer
3k views

Why does encoding a video using the MJPEG codec take longer than MPEG-4?

I am testing the encoding performance (MPEG-4 and MJPEG) of a smart camera. I have written an application in OpenCV/FFMPEG for performing encoding, where the application captures images from the ...