Play Raw Video Streams

WangBin edited this page Mar 15, 2015 · 5 revisions

Raw YUV Streams

libavformat supports raw video streams that only contains video frame data without any other information.

To get a raw yuv stream for testing, you can run

ffmpeg -i test.mp4 -c:v rawvideo -pix_fmt yuv420p test.yuv

To play the yuv stream with ffplay

ffplay -f rawvideo -pix_fmt yuv420p -s 1280x720 -i test.yuv

To play the yuv stream in QtAV player, you have to set some options for libavformat like ffplay does.

Open Setup dialog->Open AVFormat tab->Fill Extra with format_whitelist=rawvideo video_size=1280x720 pixel_format=yuv420p framerate=25->Play test.yuv

You can also setup in C++ code

QVariantHash fmt_opt;
fmt_opt["format_whitelist"] = "rawvideo"; // since QtAV 1.6 (or since commit e828f9c4)
fmt_opt["video_size"] = "1280x720";
fmt_opt["pixel_format"] = "yuv420p";
fmt_opt["framerate"] = 25;

Raw H.264 Streams

If a raw h264 stream does not have timestamp information, you must force a frame rate to the player.


It's different from raw yuv streams because we can compute the frame number by size for a raw yuv stream.

You can’t perform that action at this time.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.
Press h to open a hovercard with more details.