Digitizing Home Videos

Several years back, my father started a project to digitize our home videos. He purchased an old computer from the IMVU automated builds cluster, bought an AVerMedia C027 capture card, digitized a few tapes… and then his digitization workstation sat there for years, untouched.

Sadly, he passed away last year, so I picked up the project. There were four types of analog media to digitize: VHS tapes, 8mm tapes, audio cassettes, and old Super 8 film reels.

Super 8

The Super 8 film went to a service in Redwood City. I don’t have any relevant equipment to play it and they do a good job — they clean the tape, take high-resolution photos of each frame, and then apply color adjustments to correct for any age-related fading, overexposure, or underexposure. The output format is up to you. I selected an MP4 movie file and a 1080p JPEG for every captured frame. (30 GB of 1080p JPEGs for 20 minutes of video!)

The service worked out pretty well. My only complaint was that I gave them seven individually labeled 3″ film reels but, presumably to make it easier to process, they taped six of the reels into one larger 6″ reel, so I had to split the files back up. Avidemux made lossless splitting on the I-frame boundaries trivial.

Audio Cassettes

The audio was similarly easy. ION makes an inexpensive tape deck that advertizes itself as a stereo USB microphone. You can capture the audio straight into Audacity and clip, process, and encode as needed.

VHS and 8mm

The bulk of the project was VHS and 8mm: we had two medium-sized moving boxes plus a shoebox of VHS tapes and a medium-sized box of 8mm. Probably close to 100 tapes in all.

Home videos are not worth much if nobody can watch them, so my primary goal was to make the video conveniently accessible to family. I also wanted to minimize unnecessary re-encodes and quality loss. The film and VHS had already degraded over time. Some quality loss, unfortunately, is inevitable without spending $$$ on dedicated equipment that captures frames from the tape.

My parents happened to own a very high-quality VCR that’s still in great shape. The capture sequence ended up something like this:

Video Cassette -> VCR -> Composite Cables -> Capture Card -> MPEG-2

Since each tape contained a hodgepodge of home videos (sometimes interleaved with TV recordings!), they had to be split up. The excellent, open source dvbcut software is perfect for this: it has a quadratic slider for frame-accurate scrubbing and it only recompresses frames when your splits don’t line up precisely with I-frames. I recommend doing your dvbcut work on an SSD. Scrubbing is painful on a spinny disk.

Converting the 8mm tapes was similar except replace VCR with the (again, still in great shape) Sony camcorder in playback mode. Also, since the 8mm tapes are mono but the capture card always records in stereo, you have an option. You can either run a post-split ffmpeg -map_channel step to convert the stereo MPEG-2 files into mono. (This has to happen after splitting because dvbcut can’t read videos after ffmpeg processes them for some reason.) Or you can tell HandBrake to mixdown the audio to mono from the right channel only. The latter avoids an audio re-encode, but it’s easier to forget when setting up long HandBrake jobs.

Finally, because the captured MPEG-2 files are large (4 GB per hour of video), I recompressed in HandBrake to H.264. I don’t notice a material quality difference (besides some “free” noise reduction), and the H.264 MP4 files are smaller and have more responsive seeking.

In the end, the steps that involve quality loss are:

  1. Real-time playback. Tracking glitches, for example, result in a few missed frames. But, like I mentioned, it would take $$$ to do a precise, frame-accurate digitization of each VHS frame.
  2. Composite cables instead of S-Video. I couldn’t find a VCR on Craigslist that supported S-Video output.
  3. Capturing in MPEG-2. I’m not convinced the real-time AVerMedia MPEG-2 encoder is very good – I’d occasionally notice strips of artifacty blocks in high-frequency regions like tree lines.
  4. A few frames of dvbcut’s re-encoding at the beginning and end of every split.
  5. YouTube / HandBrake. Might be slightly better to upload the split MPEG-2 into YouTube and let it recompress, but uploading 2 TB of video to YouTube didn’t seem very fun.

The bulk of the time in this project went towards capturing the video. It has to play in real time. Each 8mm cassette was 2 hours, and VHS tapes range between 2 and 8 hours.

The bulk of the effort, on the other hand, went into splitting, labeling, and organizing. I had to rely on clues to figure out when and where some videos were set. There were many duplicate recordings, too, so I had to determine which was higher quality.

Now that all that’s done, I plan to upload everything to YouTube and make a Google Doc to share with family members, in case anyone wants to write stories about the videos or tag people in them.

Leave a Reply

Your email address will not be published. Required fields are marked *