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Video freezes, delays, and skips on playback

This topic contains 3 replies, has 3 voices, and was last updated by  Carmelink1 1 day, 19 hours ago.

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July 11, 2019 at 22:46 #13063


While annotating mp4 media files in ELAN 5.5 on my macOS high Sierra issues with the video playback are occurring. When I play the video there is a delay, the video jumps to wherever the bar appears on the timeline and plays from there. When I highlight a field to input a value it freezes and skips. This continues throughout the whole video. I switched to another media file that is .mov and I had no issues with annotating or scrubbing the video on the timeline for precise length. Please advise.

July 12, 2019 at 21:26 #13067


Well, that is difficult to say. Can you provide some information on the encoding of the video. Maybe you can compare with the recommended settings in this media encoding guide?

July 18, 2019 at 19:21 #13086


I am having a similar issue. It works fine on one computer but when I transfer the files (eaf, pfsx, video, and audio file) to another computer, the video and audio won’t play. ELAN finds the files just fine and correctly syncs them up, but just won’t play audio or video.

July 19, 2019 at 03:21 #13087


Hello Han,

The video files (there are 2) are both .mp4. There is also a .wav audio file. In Elan, I annotate with all three attached. I compared their properties with the recommended settings, and it’s the same encoding H.264.

Any ideas on what could be making the media files freeze and skip on playback and timeline scanning? Thanks.

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