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  1. Member DB83's Avatar
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    For the sake of completeness, here is your latest sample in the 360p version as encoded by yt.


    I am probably wrong but I thought that 44.1 hz was the standard for online video.
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  2. Member dellsam34's Avatar
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    Maybe, I just though that video's audio is always 48Khz and audio only is 44.1 Khz red book.
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  3. opus audio seems to be 48KHz, m4a 44.1KHz.
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  4. Member dellsam34's Avatar
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    Interestingly, I did one resize to 1080 and without encoding it to mp4 first youtube successfully encoded it in 1080p60, Very strange. I think from now on this is the way of uploading SD videos to youtube.
    File spec before uploading to youtube:

    Format : HuffYUV
    Format version : Version 2
    Codec ID : HFYU
    Duration : 1 min 21 s
    Bit rate : 420 Mb/s
    Width : 1 440 pixels
    Height : 1 080 pixels
    Display aspect ratio : 4:3
    Frame rate : 59.940 (60000/1001) FPS
    Color space : YUV
    Chroma subsampling : 4:2:2
    Bit depth : 8 bits
    Scan type : Interlaced
    Bits/(Pixel*Frame) : 4.504
    Stream size : 3.97 GiB (100%)

    Audio
    ID : 1
    Format : PCM
    Format settings : Little / Signed
    Codec ID : 1
    Duration : 1 min 21 s
    Bit rate mode : Constant
    Bit rate : 1 536 kb/s
    Channel(s) : 2 channels
    Sampling rate : 48.0 kHz
    Bit depth : 16 bits
    Stream size : 14.9 MiB (0%)
    Alignment : Aligned on interleaves
    Interleave, duration : 17 ms (1.01 video frame)
    Interleave, preload duration : 500 ms
    Here is the link to the 1080p upload.
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  5. Member dellsam34's Avatar
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    Originally Posted by butterw View Post
    opus audio seems to be 48KHz, m4a 44.1KHz.
    Oh okay, good to know, Though my mp4 encoded files are always 48Khz, I use this commend:

    Code:
    ffmpeg -i In.avi -vf "format=yuv422p,setsar=sar=10/11" -c:v libx264 -crf 10 -x264opts colorprim=smpte170m:transfer=smpte170m:colormatrix=smpte170m:force-cfr -c:a aac -b:a 192k Out.mp4
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  6. mediainfo says 59.94 and interlaced , isn't it weird?

    Also you got 1080interlaced from SD interlaced?
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  7. Member dellsam34's Avatar
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    Originally Posted by _Al_ View Post
    mediainfo says 59.94 and interlaced , isn't it weird?

    Also you got 1080interlaced from SD interlaced?
    No, MediaInfo never gets that right unless there is a flag in the file saying it's progressive so ignore that.
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  8. Dinosaur Supervisor KarMa's Avatar
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    Originally Posted by dellsam34 View Post
    Ok, Back to the subject. The first attempt failed, I de-interlaced the lossless file and resized to 960x720 and youtube lowered it to 320p max, I guess it didn't know what to make of the video since all the specs were high:.
    360p is the default quality that a video is given first out of the gate. People who follow channels closely will often put in the comments "360p gang" meaning that they are early to a video being posted, before YT processes the video more with better options. Did it ever go above 360p?

    Originally Posted by butterw View Post
    opus audio seems to be 48KHz, m4a 44.1KHz.
    Opus will always report 48khz I think. But it uses other means to drop the sample rate/bandwidth. I'm not really sure how it works exactly. https://hydrogenaud.io/index.php?topic=105326.0
    Last edited by KarMa; 24th Aug 2020 at 03:50. Reason: 360p not 320p
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  9. Member dellsam34's Avatar
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    I waited several days still 4kdownloader reports 360p as the highest quality so it was something wrong with that upload.
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  10. Originally Posted by dellsam34 View Post
    Originally Posted by _Al_ View Post
    mediainfo says 59.94 and interlaced , isn't it weird?

    Also you got 1080interlaced from SD interlaced?
    No, MediaInfo never gets that right unless there is a flag in the file saying it's progressive so ignore that.
    MediaInfo is only reporting on how your file is tagged and it likely is getting that right.
    From checking a few mp4/h264 files they do all report Scan type: Progressive.

    Does this have any impact on processing/display ? I have no idea.
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  11. Member dellsam34's Avatar
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    I had media info reporting an interlaced video as progressive, so it is not reliable in that area.
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  12. Files can be tagged wrong.

    mp4/h264 has a per-frame Interlaced tag, which can be viewed with ffmpeg/ffprobe.
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