playing m2ts videos on IINA

[stanleystf]

IINA is my absolute favorite player on Mac. It can handle everything, however, I've been experiencing issues with m2ts(bluray) videos.

They look like this sometimes:

The video is played fine, however when I rewind or skip forward, the image turns to something like that!

Any ideas how to solve this?

 

[bogdanw]

Try another setting for hardware decoder (Preferences - Video/Audio)

 

[stanleystf]

Try another setting for hardware decoder (Preferences - Video/Audio)

I have three options:

I tried different ways but still the problem persists.

 

[bogdanw]

Try to disable all: hardware decoder, Force dedicated GPU, Load ICC profile and Enable HDR support.
Then switch between Disabled, Auto and Auto (Copy).

 

[stanleystf]

Try to disable all: hardware decoder, Force dedicated GPU, Load ICC profile and Enable HDR support.
Then switch between Disabled, Auto and Auto (Copy).

Thank you!

I tried those but still the image is fuzzy when I rewind or skip forward.

 

[arw]

I tried those but still the image is fuzzy when I rewind or skip forward.

If it‘s just some seconds and not the whole movie from that point on, it can be expected/related to the codec/profile and the number of reference frames it uses:
Modern codecs don‘t save each individual frame in whole but rather the changes to previous ones (up to 16 for H.264) and reconstruct the current frame from that (and some other smart prediction stuff).
After skipping in the timeline, it can take several frames until there is enough information to fully reconstruct each pixel.
I think I experienced remuxing the movie to mkv can help as its header handles skipping differently.
I use MKVToolNix.

 

[stanleystf]

If it‘s just some seconds and not the whole movie from that point on, it can be expected/related to the codec/profile and the number of reference frames it uses:
Modern codecs don‘t save each individual frame in whole but rather the changes to previous ones (up to 16 for H.264) and reconstruct the current frame from that (and some other smart prediction stuff).
After skipping in the timeline, it can take several frames until there is enough information to fully reconstruct each pixel.
I think I experienced remuxing the movie to mkv can help as its header handles skipping differently.
I use MKVToolNix.

I don't have the same issue when I play m2ts videos with VLC Player.
Can I add newer more powerful codecs to IINA?

I don't want to remux them.

 

[bogdanw]

You can try the latest nightly build. https://nightly.iina.io/
"Nightly builds are built based on each new commit on the develop branch. They are not signed so you need to manually change your system security settings to use nightly builds."
https://iina.io/download/

 

[bogdanw]

mpv.io

a free, open source, and cross-platform media player

mpv.io

I remembered about mpv https://mpv.io and its options that can be used in IINA
Playback Control - --hr-seek=
“Select when to use precise seeks that are not limited to keyframes. Such seeks require decoding video from the previous keyframe up to the target position and so can take some time depending on decoding performance. For some video formats, precise seeks are disabled. This option selects the default choice to use for seeks; it is possible to explicitly override that default in the definition of key bindings and in input commands.”

 

[stanleystf]

mpv.io

a free, open source, and cross-platform media player

mpv.io

I remembered about mpv https://mpv.io and its options that can be used in IINA
Playback Control - --hr-seek=
“Select when to use precise seeks that are not limited to keyframes. Such seeks require decoding video from the previous keyframe up to the target position and so can take some time depending on decoding performance. For some video formats, precise seeks are disabled. This option selects the default choice to use for seeks; it is possible to explicitly override that default in the definition of key bindings and in input commands.”

I'm a bit confused. Do you mean I can choose this option in IINA or would I need to install mpv?

I couldn't find playback control in the preferences of IINA.

 

[arw]

I couldn't find playback control in the preferences of IINA.

I'm not 100% sure about the exact formatting/value, but I think this is the place.

no:	Never use precise seeks.
absolute:	Use precise seeks if the seek is to an absolute position in the file, such as a chapter seek, but not for relative seeks like the default behavior of arrow keys.
default:	Like absolute, but enable hr-seeks in audio-only cases. The exact behavior is implementation specific and may change with new releases (default).
yes:	Use precise seeks whenever possible.
always:	Same as yes (for compatibility).

 

[bogdanw]

I'm a bit confused. Do you mean I can choose this option in IINA or would I need to install mpv?

I couldn't find playback control in the preferences of IINA.

Just like screenshot-template
https://forums.macrumors.com/threads/a-video-player-with-this-feature.2365821/
Or, to avoid messing up your IINA config, install mpv and test various configuration in it first.

 

[stanleystf]

I did that but still the image is fuzzy after rewinding/skipping forward!

I installed mpv also and it has the same problem.

I think I have to hope they fix this in future updates.

 

[bogdanw]

There is already a bug report related to seek in m2ts files https://github.com/iina/iina/issues/3448
But there are many variables involved, the first one being the file (audio/video format, bitrates).
Other variables:
- seek options (defined in Key bindings for Left/Right Arrow): seconds, relative (default), absolute, absolute-percent, relative-percent, keyframes, exact
- index default or recreate
- decoder hwdec-extra-frames
- framedrop