I have a m3u8 file which i want to use with HLS.
My problem is that when i seek many times, the currentTime not match with the displayed frame. I experience that, the more seeking there is more difference. (it's like a constant +offset)
Our use case is very timing sensitive, we need to stop the videos at specific positions. For this we use the following code:
[_player addBoundaryTimeObserverForTimes:times
queue:dispatch_get_main_queue()
usingBlock:^{
weakSelf.player.rate = 0.0;
// The time is correct here, but the displayed frame is not sync with this time
CMTimeShow(weakSelf.player.currentTime);
}
]
I read that AVURLAssetPreferPreciseDurationAndTimingKey can help, but the currentTime still wrong.
NSDictionary<NSString *, id> *options = @{AVURLAssetPreferPreciseDurationAndTimingKey:@YES};
AVURLAsset *urlAsset = [AVURLAsset URLAssetWithURL:url options:options];
AVPlayerItem *item = [AVPlayerItem playerItemWithAsset:urlAsset];
I also read that there is a problem with the m3u8 itself. (for example wrong GOP size.) What is the reason for the incorrect currentTime, and how can i fix this?
ffprobe output:
ffprobe https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized.m3u8
ffprobe version 5.1 Copyright (c) 2007-2022 the FFmpeg developers
built with Apple clang version 13.1.6 (clang-1316.0.21.2.5)
configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.1 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-neon
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
[hls @ 0x152f04280] Skip ('#EXT-X-VERSION:3')
[hls @ 0x152f04280] Skip ('#EXT-X-INDEPENDENT-SEGMENTS')
[hls @ 0x152f04280] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1080p_6000000bitrate.m3u8' for reading
[hls @ 0x152f04280] Skip ('#EXT-X-VERSION:3')
[https @ 0x154045000] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1080p_15000000bitrate.m3u8' for reading
[hls @ 0x152f04280] Skip ('#EXT-X-VERSION:3')
[https @ 0x154045000] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1520p_33000000bitrate.m3u8' for reading
[hls @ 0x152f04280] Skip ('#EXT-X-VERSION:3')
[hls @ 0x152f04280] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1080p_6000000bitrate_00001.ts' for reading
[hls @ 0x152f04280] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1080p_6000000bitrate_00002.ts' for reading
[hls @ 0x152f04280] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1080p_15000000bitrate_00001.ts' for reading
[hls @ 0x152f04280] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1080p_15000000bitrate_00002.ts' for reading
[hls @ 0x152f04280] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1520p_33000000bitrate_00001.ts' for reading
[hls @ 0x152f04280] Opening 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized1520p_33000000bitrate_00002.ts' for reading
Input #0, hls, from 'https://mrkresz-content-bucket.s3.eu-central-1.amazonaws.com/applicationData/extended-path-videos/4b0046fd-0be7-4a07-bc7c-c1a0069116b1/released/50816bc9-6118-4dd1-a90e-fb72652bb06f-final-from-anonymized.m3u8':
Duration: 00:49:43.00, start: 2.033367, bitrate: 0 kb/s
Program 0
Metadata:
variant_bitrate : 8133826
Stream #0:0: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn
Metadata:
variant_bitrate : 8133826
Program 1
Metadata:
variant_bitrate : 18870392
Stream #0:1: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn
Metadata:
variant_bitrate : 18870392
Program 2
Metadata:
variant_bitrate : 40776144
Stream #0:2: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 2704x1520 [SAR 1:1 DAR 169:95], 29.97 fps, 29.97 tbr, 90k tbn
Metadata:
variant_bitrate : 40776144