add test.

mp4parse/tests/public.rs

@@ -231,6 +231,10 @@ static AUDIO_AMRWB_3GP: &str = "tests/amr_wb_1f.3gp";
 // "ffmpeg -i [input file] -f mp4 -c:v mpeg4 -vf scale=176x144 -frames:v 1 -an output.mp4"
 static VIDEO_MP4V_MP4: &str = "tests/bbb_sunflower_QCIF_30fps_mp4v_noaudio_1f.mp4";
 
+// The 1 frame h264 mp4 file with pasp box generated by ffmpeg with command
+// ffmpeg -f lavfi -i color=c=white:s=640x480 -c:v libx264 -frames:v 1 -pix_fmt yuv420p -vf "setsar=16/9" h264_white_frame_sar_16_9.mp4
+static VIDEO_H264_PASP_MP4: &str = "tests/h264_white_frame_sar_16_9.mp4";
+
 // Adapted from https://github.com/GuillaumeGomez/audio-video-metadata/blob/9dff40f565af71d5502e03a2e78ae63df95cfd40/src/metadata.rs#L53
 #[test]
 fn public_api() {
@@ -1468,6 +1472,29 @@ fn public_video_hevc() {
     }
 }
 
+
+#[test]
+fn public_parse_pasp_h264() {
+    let mut fd = File::open(VIDEO_H264_PASP_MP4).expect("Unknown file");
+    let mut buf = Vec::new();
+    fd.read_to_end(&mut buf).expect("File error");
+
+    let mut c = Cursor::new(&buf);
+    let context = mp4::read_mp4(&mut c).expect("read_mp4 failed");
+    for track in context.tracks {
+        let stsd = track.stsd.expect("expected an stsd");
+        let v = match stsd.descriptions.first().expect("expected a SampleEntry") {
+            mp4::SampleEntry::Video(ref v) => v,
+            _ => panic!("expected a VideoSampleEntry"),
+        };
+        assert_eq!(v.codec_type, mp4::CodecType::H264);
+        assert_eq!(v.width, 640);
+        assert_eq!(v.height, 480);
+        assert!(v.pixel_aspect_ratio.is_some(), "pixel_aspect_ratio should exist");
+        assert_eq!(v.pixel_aspect_ratio.unwrap() as f32, 16.0 / 9.0, "pixel_aspect_ratio should be 16/9");
+    }
+}
+
 #[test]
 #[cfg(feature = "3gpp")]
 fn public_audio_amrnb() {