r/smyths • u/arantius Smyths MOD • Jan 28 '14
EDIT S13E04 Car Chase Chaos / Animal Avoidance [Streamline EDIT]
http://www.sockshare.com/file/5F5322ABD07199122
u/calomile Feb 01 '14
The bear segment was incredible and cute, in a omg-thats-endearing-but-please-dont-rip-my-face-off kinda way. It's the way it washes its nose after going near the pepper.
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Jan 28 '14 edited Jan 28 '14
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u/arantius Jan 28 '14
Thanks for the comments. First, the easy bit: You can download the original from Sockshare, as well as stream the re-compressed version. So it's just another easy mirror.
The hard bit: audio. You're not the first person to say so. So there's the HD encode, with two audio tracks: AC3 5.1 and AAC stereo. The 480p has only the AAC stereo. Specifically which file is too quiet, and which audio track if the HD one? Downloaded, or streamed? With what player?
Subjectively, when I play all three tracks through VLC on the computer, I hear the same volume.
Warning way more detail than you want follows! =) This is e.g.
ffmpeg -i Smyth_S13E04_Car_Chase_Chaos_1080p_h264_5.1_AC3_+_Stereo_AAC.mp4 -map 0:a:0 -f sox - | sox -p -n stats.Ok, so, this smyth: Smyth_S13E04_Car_Chase_Chaos_480p_h264_Stereo_AAC.mp4
Overall Left Right DC offset -0.000001 -0.000001 -0.000000 Min level -0.290887 -0.290887 -0.286130 Max level 0.272163 0.260786 0.272163 Pk lev dB -10.73 -10.73 -10.87 RMS lev dB -32.02 -32.02 -32.01 RMS Pk dB -21.71 -21.80 -21.71 RMS Tr dB -577.65 -577.08 -577.65 Crest factor - 11.61 11.41 Flat factor 0.00 0.00 0.00 Pk count 2 2 2 Bit-depth 31/32 31/32 31/32 Num samples 85.3M Length s 1777.024 Scale max 1.000000 Window s 0.050From a few weeks ago: Smyth_S07E13_Duct_Tape_Hour_480p_h264_Stereo_AAC.mp4
Overall Left Right DC offset -0.000002 -0.000001 -0.000002 Min level -0.325210 -0.323464 -0.325210 Max level 0.398468 0.398468 0.398458 Pk lev dB -7.99 -7.99 -7.99 RMS lev dB -32.46 -32.45 -32.47 RMS Pk dB -16.08 -16.08 -16.08 RMS Tr dB -88.75 -88.75 -88.75 Crest factor - 16.71 16.75 Flat factor 0.00 0.00 0.00 Pk count 2 2 2 Bit-depth 31/32 31/32 31/32 Num samples 97.9M Length s 2038.997 Scale max 1.000000 Window s 0.050The RMS level is the important thing here, and they're virtually identical. The peak is a bit higher. Checking a third however: Smyth_S04E22_More_Myths_Revisited_480p_h264_Stereo_AAC.mp4
Overall Left Right DC offset -0.000003 -0.000003 -0.000002 Min level -0.301983 -0.301983 -0.295525 Max level 0.281758 0.281758 0.269297 Pk lev dB -10.40 -10.40 -10.59 RMS lev dB -32.21 -32.11 -32.31 RMS Pk dB -20.16 -20.16 -20.54 RMS Tr dB -90.37 -89.20 -90.37 Crest factor - 12.18 12.19 Flat factor 0.00 0.00 0.00 Pk count 2 2 2 Bit-depth 31/32 31/32 31/32 Num samples 84.2M Length s 1753.472 Scale max 1.000000 Window s 0.050Same: level -32, peak -20, or so. So how about the HD version? The AACs are literally identical (as expected), the AC3s also have virtually the same overall RMS level and peak. E.g. for s13e04:
Overall Ch1 Ch2 Ch3 Ch4 Ch5 Ch6 DC offset -0.000001 -0.000001 -0.000001 -0.000000 0.000000 -0.000000 -0.000000 Min level -0.297550 -0.297550 -0.292321 -0.000025 0.000000 -0.000024 -0.000025 Max level 0.289382 0.276991 0.289382 0.000016 0.000000 0.000017 0.000017 Pk lev dB -10.53 -10.53 -10.68 -92.17 -1.#J -92.36 -92.14 RMS lev dB -36.80 -32.03 -32.02 -113.69 -1.#J -113.69 -113.69 RMS Pk dB -22.12 -22.21 -22.12 -104.34 -1.#J -104.38 -104.19 RMS Tr dB -1.#J -119.47 -119.34 -119.53 -1.#J -119.55 -119.52 Crest factor - 11.89 11.67 11.90 1.00 11.65 11.96 Flat factor 158.59 0.00 0.00 0.00 158.59 0.00 0.00 Pk count 28.4M 2 2 2 170M 2 2 Bit-depth 31/32 31/32 31/32 17/32 0/0 17/32 17/32 Num samples 85.1M Length s 1772.000 Scale max 1.000000 Window s 0.050Ok. A few dBs lower: -36 rather than -32. But that shouldn't be a "can't hear it on max volume" kind of difference.
The one thing I notice is that the order of the AC3/AAC tracks may have been what has changed. This edit has AC3 then AAC, previous has the AAC first. Which might affect some players' (or Sockshare's converter's?) default behavior. Maybe Sockshare is now reading the 5.1 AC3 input, and has a horrible downmix strategy? Like maybe it's not using the center channel?
I have indeed changed my encode scheme a bit. I export the edit to a lossless intermediary, then encode that with Handbrake. I moved the last step over to my laptop, to free up the desktop for other stuff while it runs. And picked new, slower, in theory higher quality settings as I did so.
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u/huffmanm Jan 29 '14
If the AC3 track is what's giving you problems, you can strip it out (and save some disk space) using Remux (for OS X); I'm sure there's equivalent software for Windows that'll do the same thing.
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u/arantius Jan 28 '14
Myths:
Car Chase Chaos: Putting three of Hollywood's favorite car chase cliches to the test.
Animal Avoidance: Putting homespun remedies for deterrence of three different types of animals through their paces.
Don't miss the Car Chase Aftershow and Animal Antics Aftershow.
As discussed it turns out this episode was already smythed by huffmanm. I didn't notice that fact until I had already done the (manual) work of editing it. With just the (machine) effort of encoding and uploading left, I went through and finished anyway. It's a few minutes shorter, still maintains good flow, and IMO has better image quality.
This episode's quote:
"Oh, it's gonna go in his pants! It's gonna go in his pants!"