Author Topic: playing image per image backward stutters  (Read 273 times)

JB

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playing image per image backward stutters
« on: September 28, 2018, 04:58:02 PM »
I use the UP key to go to the wanted keyframe, ok
When using the RIGHT key to play image per image forward, it's smooth
When using the LEFT key to play image per image backward, it stutters, it hangs, it"s not smooth

is it my computer?
or the images before the keyframe are not buffered,
or there is a setting somewhere to enable buffering,
or it is not possible due to how the player plays video,
or it's coming in the next version,
or else?

eumagga0x2a

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Re: playing image per image backward stutters
« Reply #1 on: September 28, 2018, 05:37:42 PM »
Avidemux caches max. 8 previously decoded pictures. Once the content of the cache is consumed, it has to decode from the start of the GOP until the desired picture pops up. After that, you would be able display 7 more previous pictures smoothly because they are already in the cache.

To implement smooth reverse playback, Avidemux would have to cache both the current and the previous GOP, which might fill gigabytes of memory with long GOPs and Full HD let alone 4K video.

This is not coming anytime soon.

Edit: The above means that you get perfectly smooth reverse playback with intra-only codecs like MJPEG.
« Last Edit: September 28, 2018, 05:41:27 PM by eumagga0x2a »