Smoother "playback" when moving through timeline about lossless-cut HOT 9 CLOSED

are you getting a warning "file not natively supported" when opening the file in losslesscut? or do you see this lag behavior also with e.g. h264 files in mp4

from lossless-cut.

It does it with AVC files, both ones encoded in 264 and ripped from discs. If I advance forward/backward slowly, it works fine, but if I do so even somewhat quickly, it will only change the displayed frame every so often, every few to several frames depending on how quickly I do it. If I hold down the key, it doesn't change until I release it. Whereas in PotPlayer, even if I hold it down, it advances frame-by-frame very quickly (with audio, even), and while it doesn't work so well in reverse (holding it down works mostly the same way, though even then it will periodically change), I can press it repeatedly very quickly and it will work. And that's even with x265. And Avidemux works very well forwards and backwards. So it's clearly possible, and my system is capable of it, so it would be nice if LC could be made to do so as well.

from lossless-cut.

what if you try to open the video file in google chrome and seek, do you see similar behaviour? im asking because losslesscut uses chrome's html5 video player, so it's at the mercy of its implementation

from lossless-cut.

Can't even get chrome to play them, just keeps "downloading" them.

from lossless-cut.

If you can provide a report from the help menu (report an error) then it’s easier to help.

from lossless-cut.

No error occurred.

{
"state": {
"ffmpegExperimental": false,
"preserveMovData": false,
"movFastStart": true,
"preserveMetadataOnMerge": false,
"filePath": ".mkv",
"fileFormat": "matroska",
"externalFilesMeta": {},
"mainStreams": [
{
"index": 0,
"codec_name": "h264",
"codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
"profile": "High",
"codec_type": "video",
"codec_tag_string": "[0][0][0][0]",
"codec_tag": "0x0000",
"width": 1920,
"height": 1080,
"coded_width": 1920,
"coded_height": 1080,
"closed_captions": 0,
"film_grain": 0,
"has_b_frames": 4,
"sample_aspect_ratio": "1:1",
"display_aspect_ratio": "16:9",
"pix_fmt": "yuv420p",
"level": 41,
"chroma_location": "left",
"field_order": "progressive",
"refs": 1,
"is_avc": "true",
"nal_length_size": "4",
"r_frame_rate": "24000/1001",
"avg_frame_rate": "24000/1001",
"time_base": "1/1000",
"start_pts": 84,
"start_time": "0.084000",
"bits_per_raw_sample": "8",
"extradata_size": 130,
"disposition": {
"default": 1,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0,
"timed_thumbnails": 0,
"captions": 0,
"descriptions": 0,
"metadata": 0,
"dependent": 0,
"still_image": 0
},
"tags": {
"language": "eng",
"BPS-eng": "34641184",
"DURATION-eng": "00:25:17.656000000",
"NUMBER_OF_FRAMES-eng": "36380",
"NUMBER_OF_BYTES-eng": "6571675272",
"_STATISTICS_WRITING_APP-eng": "mkvmerge v47.0.0 ('Black Flag') 64-bit",
"_STATISTICS_WRITING_DATE_UTC-eng": "2020-06-21 00:45:33",
"_STATISTICS_TAGS-eng": "BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES"
}
},
{
"index": 1,
"codec_name": "dts",
"codec_long_name": "DCA (DTS Coherent Acoustics)",
"profile": "DTS-HD MA",
"codec_type": "audio",
"codec_tag_string": "[0][0][0][0]",
"codec_tag": "0x0000",
"sample_fmt": "s32p",
"sample_rate": "48000",
"channels": 6,
"channel_layout": "5.1(side)",
"bits_per_sample": 0,
"initial_padding": 0,
"r_frame_rate": "0/0",
"avg_frame_rate": "0/0",
"time_base": "1/1000",
"start_pts": 92,
"start_time": "0.092000",
"bits_per_raw_sample": "24",
"disposition": {
"default": 1,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0,
"timed_thumbnails": 0,
"captions": 0,
"descriptions": 0,
"metadata": 0,
"dependent": 0,
"still_image": 0
},
"tags": {
"language": "fre",
"BPS-eng": "4039139",
"DURATION-eng": "00:25:17.572000000",
"NUMBER_OF_FRAMES-eng": "142240",
"NUMBER_OF_BYTES-eng": "766210700",
"_STATISTICS_WRITING_APP-eng": "mkvmerge v47.0.0 ('Black Flag') 64-bit",
"_STATISTICS_WRITING_DATE_UTC-eng": "2020-06-21 00:45:33",
"_STATISTICS_TAGS-eng": "BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES"
}
},
{
"index": 2,
"codec_name": "hdmv_pgs_subtitle",
"codec_long_name": "HDMV Presentation Graphic Stream subtitles",
"codec_type": "subtitle",
"codec_tag_string": "[0][0][0][0]",
"codec_tag": "0x0000",
"r_frame_rate": "0/0",
"avg_frame_rate": "0/0",
"time_base": "1/1000",
"start_pts": 84,
"start_time": "0.084000",
"duration_ts": 1517664,
"duration": "1517.664000",
"disposition": {
"default": 1,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 1,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0,
"timed_thumbnails": 0,
"captions": 0,
"descriptions": 0,
"metadata": 0,
"dependent": 0,
"still_image": 0
},
"tags": {
"language": "eng",
"title": "Foreign Language (Forced)",
"BPS-eng": "26197",
"DURATION-eng": "00:23:20.121000000",
"NUMBER_OF_FRAMES-eng": "420",
"NUMBER_OF_BYTES-eng": "4584938",
"_STATISTICS_WRITING_APP-eng": "mkvmerge v47.0.0 ('Black Flag') 64-bit",
"_STATISTICS_WRITING_DATE_UTC-eng": "2020-06-21 00:45:33",
"_STATISTICS_TAGS-eng": "BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES"
}
}
],
"copyStreamIdsByFile": {
".mkv": {
"0": true,
"1": true,
"2": true
}
},
"cutSegments": [
{}
],
"mainFileFormatData": {
"filename": ".mkv",
"nb_streams": 3,
"nb_programs": 0,
"format_name": "matroska,webm",
"format_long_name": "Matroska / WebM",
"start_time": "0.084000",
"duration": "1517.664000",
"size": "7340896653",
"bit_rate": "38695767",
"probe_score": 100,
"tags": {
"encoder": "libebml v1.3.10 + libmatroska v1.5.2",
"creation_time": "2020-06-21T00:45:33.000000Z"
}
},
"rotation": 360,
"shortestFlag": false,
"effectiveExportMode": "separate",
"outSegTemplate": "${FILENAME}-${CUT_FROM}-${CUT_TO}${SEG_SUFFIX}${EXT}"
},
"platform": "win32",
"version": "3.59.1"
}

from lossless-cut.

You could try to File -> Convert to supported format -> "Fast: Full quality remux, likely to fail" or "Fast: Remux video, encode audio (fails if unsupported video codec)"

from lossless-cut.

Neither of those options made a difference, which isn't surprising since it was already a supported format. I'd also be very hesitant to use them since I wouldn't want to spend a bunch of time doing edits only to have it fail or, worse, have something not work right and not realize it and get a corrupted output file.

from lossless-cut.

The fact that chrome tried to download it lead me to believe it’s not natively supported. However if you say that it’s supported, then I don’t know anything that can be done to improve this, because we’re at the mercy of chromium html5 player.

from lossless-cut.