Frozen audio on resuming

[Matisse]

Hi,

Whenever I pause a video or audio, and then resume it, there’s a slight delay (around 1 second) before the audio plays again. If it is a video I’m watching, the video resumes immediately, but the audio freezes for a second before resuming.

This happens both on my iPhone 8 Plus and iPad Air 2. On my iPhone I have iOS 16.2 installed.

As an example, the video with which I’m having this problem is h264 mp4a encoded.

VLC version:

VLC for iOS

Version: 3.3.12 (447)

Based on:
3.0.18-49-g6d05e51307

This is something happening for years. It is something preventing me from using this app, and I’ll be very glad if something is done about it. Thanks.

Matisse

[fkuehne]

This is fixed for version 4 of VLC scheduled for next year. So far, this cannot be fixed by you in the app.

[Matisse]

The above problem still hasn’t been fixed. I understand it will be fixed in VLC 4. Will it be released this year? I hope it’s the next version.

[fkuehne]

We sincerely hope that 2023 will be the year of VLC 4, yes.

[8kguy]

I noticed something strange in the VLCKit code that may be related to the issue.
Inside VLCMediaPlayer.m we currently have this:

Code: Select all

- (void)play { libvlc_media_player_play(_playerInstance); } - (void)pause { libvlc_media_player_set_pause(_playerInstance, 1); }

Looking at vlc/lib/media_player.c which contains both libvlc functions called here, we see that libvlc_media_player_play always calls vlc_player_start before possibly calling resume.

Code: Select all

int libvlc_media_player_play( libvlc_media_player_t *p_mi ) { vlc_player_t *player = p_mi->player; vlc_player_Lock(player); int ret = vlc_player_Start(player); if (ret == VLC_SUCCESS) { if (vlc_player_IsPaused(player)) vlc_player_Resume(player); } vlc_player_Unlock(player); return ret; }

Meanwhile, under libvlc_media_player_set_pause, we see that it can either call pause/stop or resume, depending on the number specified in the second parameter.

Code: Select all

void libvlc_media_player_set_pause( libvlc_media_player_t *p_mi, int paused ) { vlc_player_t *player = p_mi->player; vlc_player_Lock(player); if (paused) { if (vlc_player_CanPause(player)) vlc_player_Pause(player); else vlc_player_Stop(player); } else { vlc_player_Resume(player); } vlc_player_Unlock(player); }

Could it be that we were supposed to call libvlc_media_player_set_pause to resume playback instead of libvlc_media_player_play?