why do h.264 .ts files take to play after seek to spot in video

[jamespoo]

so i download sometime .ts h.264 videos online and when i try in vlc player or media player classic i will go to a part in the video but it will play the audio but takes anywhere from 5seconds to maybe 15seconds or more for the video to start playing

only way for me to fix this is using avidemux to mux the .ts to mp4 only takes a couple of seconds but is really annoying having to do this

what may cause this

[davexnet]

Placing the elementary or transport streams into a container such as mkv or mp4 fixes the issues you're seeing.
I don't know the technical details, perhaps somebody else can explain it, but I think the container facilitates extra or fixes certain timing issues
related to the presentation of the video/audio

[jagabo]

The TS probably starts with a GOP that had it's keyframe removed (ie, randomly cut in an editor). So the GOP can't be displayed, video playback will start at the second GOP. But audio can start playing from the first GOP. The end result is you get audio with no video for the duration of the initial GOP. When you re-mux the TS to another container, either the first GOP and the associated audio are removed, or the player automatically starts playback of both the video and audio at the second GOP.

[jamespoo]

The TS probably starts with a GOP that had it's keyframe removed (ie, randomly cut in an editor). So the GOP can't be displayed, video playback will start at the second GOP. But audio can start playing from the first GOP. The end result is you get audio with no video for the duration of the initial GOP. When you re-mux the TS to another container, either the first GOP and the associated audio are removed, or the player automatically starts playback of both the video and audio at the second GOP.

thanks