In Safari, Progress bar shows current time as 59:-1 when skip back past start of video

[karendolan]

In Safari, the video appears to be allowed to seek to a time before the start of the video and to a time after the end of the video.

I suspect that adding protection for mp4 setCurrentTime to set video.currentTime only to a point in 0-duration might help https://github.com/polimediaupv/paella-core/blob/main/src/js/videoFormats/es.upv.paella.mp4VideoFormat.js#L90-L94. I will attempt this locally...

To duplicate

• Open Safari browser (test on Mac Os X)
• Go to https://paellaplayer.upv.es/player.html?id=belmar-multiresolution-remote
• Click play
• Pause the play
• click the skip back button a couple times
• Notice the timeline bar shows something unexpected like "59:-1" or "59:-30"
• EXPECTED: the lowest current time returned by the video wrapper is 0, the lowest time shown in the timeline bar is 0, the lowest time allowed to seekto is 0, the highest time allowed to seek to is video duration (or a couple seconds before the end of video duration)

[karendolan]

Verified that this patches the issue in mp4VideoFormat in Safari.

async setCurrentTime(t) {
    if (this._videoEnabled) {
      await this.waitForLoaded();
      const dur = this.video.duration;
+     if (t >= dur) {
+        // restrict seek-forward to 2 seconds to the end
+       this.video.currentTime = dur - 2;
+     }
+     else if (t < 0) {
+        // restrict seek-back to 0
+        this.video.currentTime = 0;
 +    }
 +    else {
 +       this.video.currentTime = t;
 +    }
 -    this.video.currentTime = t;
      return t;
    }
    else {
      this._disabledProperties.currentTime = t;
      return t;
    }
  }