Interlacing issues with captured video
Posted: 30 Mar 2013 22:20
A few weeks ago I found some of my old middle school basketball games on VHS tapes and decided to have a go at learning some video editing while converting the tapes to a digital format (DVD). Step one, of course, was to get the video off the tapes and onto my computer. I borrowed a VCR from my Mom, as well as the Dazzle DVC100 USB capture device I bought her a couple of years ago, and tried to figure out if I could even get the device to work in Ubuntu. Lo and behold, after trying a few different things, I was able to get a pretty satisfactory capture (of video, anyway... couldn't finagle the audio, but I did that later with Audacity) out of VLC.
To make a long story short, I need to do it again (because I think I made some bed decisions regarding resolution/framerate/etc.), but I can't reproduce the quality I managed before, and I made the cardinal mistake of not documenting what I was doing while I was doing it.
The main problem is that my videos are now coming out with some bad combing from the interlacing. I looked at the previous video (which I'm pretty sure came straight out of VLC), and there's no combing in it. I do remember having an issue with it originally, but somehow I got past it, and I can't for the life of me remember if I did something about it, or if it just decided to start working.
Here's what avconv says about the original "good" file:
And here's my attempt (and failure) at duplicating that format exactly:
Basically, to walk through what I'm doing...
I'm rather confused at this point. Does anyone have any ideas on what I may have done before that could have crushed the interlacing?
To make a long story short, I need to do it again (because I think I made some bed decisions regarding resolution/framerate/etc.), but I can't reproduce the quality I managed before, and I made the cardinal mistake of not documenting what I was doing while I was doing it.
The main problem is that my videos are now coming out with some bad combing from the interlacing. I looked at the previous video (which I'm pretty sure came straight out of VLC), and there's no combing in it. I do remember having an issue with it originally, but somehow I got past it, and I can't for the life of me remember if I did something about it, or if it just decided to start working.
Here's what avconv says about the original "good" file:
Code: Select all
avconv version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers
built on Jan 24 2013 14:52:53 with gcc 4.7.2
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x8b9e880] multiple edit list entries, a/v desync might occur, patch welcome
[h264 @ 0x8ba3200] illegal reordering_of_pic_nums_idc
[h264 @ 0x8ba3200] decode_slice_header error
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/david/Pictures/basketball.mp4':
Metadata:
major_brand : isom
minor_version : 0
compatible_brands: mp41avc1qt
creation_time : 2013-03-12 02:03:42
encoder : vlc 2.0.5 stream output
encoder-eng : vlc 2.0.5 stream output
Duration: 01:38:39.96, start: 0.000000, bitrate: 1153 kb/s
Stream #0.0(eng): Audio: mp2, 44100 Hz, stereo, s16, 127 kb/s
Metadata:
creation_time : 2013-03-12 02:03:42
Stream #0.1(eng): Video: h264 (High), yuv420p, 696x480 [PAR 80:87 DAR 4:3], 1016 kb/s, 29.97 fps, 1001 tbr, 1001 tbn, 8589.93 tbc
Metadata:
creation_time : 2013-03-12 02:03:42Code: Select all
avconv version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers
built on Jan 24 2013 14:52:53 with gcc 4.7.2
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x9db9880] multiple edit list entries, a/v desync might occur, patch welcome
[h264 @ 0x9dbe200] illegal reordering_of_pic_nums_idc
[h264 @ 0x9dbe200] decode_slice_header error
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/david/Desktop/bballvideos/basketball2.mp4':
Metadata:
major_brand : isom
minor_version : 0
compatible_brands: mp41avc1qt
creation_time : 2013-03-30 21:03:43
encoder : vlc 2.0.5 stream output
encoder-eng : vlc 2.0.5 stream output
Duration: 00:00:33.26, start: 0.000000, bitrate: 2927 kb/s
Stream #0.0(eng): Audio: mp3, 44100 Hz, stereo, s16, 127 kb/s
Metadata:
creation_time : 2013-03-30 21:03:43
Stream #0.1(eng): Video: h264 (High), yuv420p, 696x480 [PAR 80:87 DAR 4:3], 2793 kb/s, 30 fps, 25 tbr, 1001 tbn, 50 tbc
Metadata:
creation_time : 2013-03-30 21:03:43- Open VLC (2.0.5) and hit Media->Convert/Save...
- On the Capture Device tab, select my Video Device, an Audio Device, NTSC video standard, and hit Advanced Options.
- Enter Width=696, Height=480, Framerate=29.97, click Ok, then click "Convert/Save"
- Choose a destination file, leave Profile at the default "Video - H.264 + MP3 (MP4)", and click "Start". (The Deinterlace check doesn't seem to do anything... I've tried with and without.
I'm rather confused at this point. Does anyone have any ideas on what I may have done before that could have crushed the interlacing?