playing a raw video using gst-launch
15,346
There are 2 issues. First the framerate is expected to be a fraction, so you should use 24/1 instead of 24.
The second problem is that the filesrc will read chunks of the file that are not the expected size of a frame, so frames won't be aligned with gstreamer buffers. You can either use filesrc's blocksize property to pass the correct bytes size of a frame (width * height * bytes per pixel) or you can just use videoparse element.
gst-launch-1.0 filesrc location=/home/user/Videos/out.yuv ! videoparse width=1920 height=816 framerate=24/1 format=2 ! autovideoconvert ! autovideosink
Check "gst-inspect-1.0 videoparse" to learn about its available properties
Author by
neeru
Updated on June 28, 2022Comments
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neeru almost 2 years
I've created a raw video file using filesink, I am able to play the file with vlc with the following command
vlc --demux rawvideo --rawvid-fps 24 --rawvid-width 1920 --rawvid-height 816 --rawvid-chroma I420 /home/user/Videos/out.yuv
But, with
gst-launch-1.0 filesrc location=/home/user/Videos/out.yuv ! video/x-raw,format=I420,height=816,width=1920,framerate=24 ! autovideoconvert ! autovideosink
throws error
Setting pipeline to PAUSED ... Pipeline is PREROLLING ... ERROR: from element /GstPipeline:pipeline0/GstCapsFilter:capsfilter0: Filter caps do not completely specify the output format Additional debug info: gstcapsfilter.c(348): gst_capsfilter_prepare_buf (): /GstPipeline:pipeline0/GstCapsFilter:capsfilter0: Output caps are unfixed: EMPTY ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... Freeing pipeline ...
Any clue how to resolve this error?