We are using a streaming camera to record and to play back surveillance video.
This camera sends a RTSP stream which will be recorded by our application as a H264 video.
In our application, the H264 videos will be stored in a MP4 container and will be published on a HTTP-server (Apache2). The stored videos can now be watched with any HTML5 web browser. So far, so good!
Our problem is, that the camera sends his frames with a variable frame rate. This is not a problem as long we watch the stream live. But when we watch the recorded H264/MP4 videos the time begins to drift. This means because of the variable frame rate, sometimes the video will be played too fast and the time is not correct!
So, does someone have experience with H264 videos with variable frame rate (VFR)? How can we play these VFR videos without time drift? Is it possible to convert VFR video to video with constant frame rate?
(All tested players like VLC seems to have the same problem...)
Here the output of mediainfo:
Complete name : VIDEO_REPLICA_12.h264 Format : AVC Format/Info : Advanced Video Codec File size : 249 MiB Overall bit rate mode : Variable Video Format : AVC Format/Info : Advanced Video Codec Format profile : High@L3.2 Format settings, CABAC : Yes Format settings, ReFrames : 1 frame Format settings, GOP : M=1, N=15 Bit rate mode : Variable Maximum bit rate : 20.0 Mbps Width : 1 280 pixels Height : 800 pixels Display aspect ratio : 1.600 Frame rate mode : Variable Standard : NTSC Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive