add video format i420

CHANGES.md

@@ -1,4 +1,9 @@
 # Changelog
 
+### v0.0.2 (16.04.2020)
+- fixed "iterator not iterable" error (by edumotya)
+- support for python3.5
+- added blocking to appsrc to reduce memory consumption by queue
+
 ### v0.0.1 (18.01.2020)
 - Released stable version

README.md

@@ -1,3 +1,10 @@
+## gstreamer-python
+### Purpose
+- abstraction over [PyGOBJECT API](https://lazka.github.io/pgi-docs/) for Gstreamer
+- work with Gstreamer metadata 
+- common tools for Gstreamer pipeline management
+- easy [gst-python](https://github.com/GStreamer/gst-python) installation
+
 ### Install
 #### Install OS packages
 - [How to install Gstreamer on Ubuntu](http://lifestyletransfer.com/how-to-install-gstreamer-on-ubuntu/)

examples/gst_capture.py

@@ -9,16 +9,16 @@
 VIDEO_FORMAT = GstVideo.VideoFormat.RGB
 
 video_format_str = GstVideo.VideoFormat.to_string(VIDEO_FORMAT)
-caps_filter = f"capsfilter caps=video/x-raw,format={video_format_str},width={WIDTH},height={HEIGHT}"
-command = f"videotestsrc num-buffers={NUM_BUFFERS} ! {caps_filter} ! appsink emit-signals=True sync=false"
+caps_filter = "capsfilter caps=video/x-raw,format={video_format_str},width={WIDTH},height={HEIGHT}".format(**locals())
+command = "videotestsrc num-buffers={NUM_BUFFERS} ! {caps_filter} ! appsink emit-signals=True sync=false".format(**locals())
 
 last_buffer = None
 with GstContext(), GstVideoSource(command) as pipeline:
 
     while pipeline.is_active or pipeline.queue_size > 0:
         buffer = pipeline.pop()
         if buffer:
-            print(f"{Gst.TIME_ARGS(buffer.pts)}: shape {buffer.data.shape}")
+            print("{}: shape {}".format(Gst.TIME_ARGS(buffer.pts), buffer.data.shape))
             last_buffer = buffer
 
-print(f"Read {last_buffer.offset} buffers")
+print("Read {} buffers".format(last_buffer.offset))

examples/gst_capture_and_display.py

@@ -9,8 +9,8 @@
 VIDEO_FORMAT = GstVideo.VideoFormat.RGB
 
 video_format_str = GstVideo.VideoFormat.to_string(VIDEO_FORMAT)
-caps_filter = f"capsfilter caps=video/x-raw,format={video_format_str},width={WIDTH},height={HEIGHT}"
-capture_cmd = f"videotestsrc num-buffers={NUM_BUFFERS} ! {caps_filter} ! appsink emit-signals=True sync=false"
+caps_filter = "capsfilter caps=video/x-raw,format={video_format_str},width={WIDTH},height={HEIGHT}".format(**locals())
+capture_cmd = "videotestsrc num-buffers={NUM_BUFFERS} ! {caps_filter} ! appsink emit-signals=True sync=false".format(**locals())
 
 display_cmd = "appsrc emit-signals=True is-live=True ! videoconvert ! gtksink sync=false"
 
@@ -29,4 +29,4 @@
         if buffer:
             display.push(buffer.data, pts=buffer.pts,
                          dts=buffer.dts, offset=buffer.offset)
-            # print(f"{Gst.TIME_ARGS(buffer.pts)}: shape {buffer.data.shape}")
+            # print("{}: shape {}".format(Gst.TIME_ARGS(buffer.pts), buffer.data.shape))

examples/gst_display.py

@@ -17,4 +17,4 @@
     while pipeline.is_done:
         pass
 
-    print(f"Displayed {pipeline.total_buffers_count} buffers")
+    print("Displayed {} buffers".format(pipeline.total_buffers_count))

examples/gst_launch_many.py

@@ -7,7 +7,7 @@
 if __name__ == '__main__':
     with GstContext():
         pipelines = [GstPipeline(
-            f"videotestsrc num-buffers={randint(50, 300)} ! gtksink") for _ in range(5)]
+            "videotestsrc num-buffers={} ! gtksink".format(randint(50, 300))) for _ in range(5)]
 
         for p in pipelines:
             p.startup()