FFmpeg

One of the first operations I learned in FFmpeg was how to scale subsampled video files back to the source resolution to compute PSNR in the Moscow State University (MSU) Video Quality Measurement Tool (VQMT). Thankfully, for those not familiar with FFmpeg, as of VQMT version 11.1, this operation is no longer necessary. Yup, VQMT can now autoscale your lower-resolution …

This article details how the FFmpeg threads command impacts performance, overall quality, and transient quality for live and VOD encoding. The level of testing and analysis detailed here is consistent with the instruction in my book, Learn to Produce Videos with FFmpeg In 30 Minutes or Less ($34.95), and my course, FFmpeg for Adaptive Bitrate Production ($29.95)  (which includes a …

This article has been superseded by this article entitled, An FFmpeg Script to Render and Package a Complete HLS Presentation. So there I was, teaching a class at Streaming Media East entitled How To Build A Free Encoder/Packager With Watch Folder Operation Using Open Source Tools (handout and video available here). An attendee asked about creating an HLS manifest with …

Here’s the download: T20_Build_Free_Encoder_FFmpeg_Bento_short. The video is below. T202. How To Build A Free Encoder/Packager With Watch Folder Operation Using Open Source Tools Wednesday, May 8: 11:45 a.m. – 12:30 p.m. Open source tools like FFmpeg and Bento4 are used to build massive encoding farms for high-profile premium content services, but they also serve wonderfully as simple tools for smaller developers …

Here’s the description; download handout here. T103. A Survey Of Per-Title Encoding Technologies Tuesday, May 7: 1:45 p.m. – 2:30 p.m. Per-title encoding techniques customize the encoding ladder to match the encoding complexity of the source, saving bandwidth on easy-to-compress videos and ensuring the quality of more complex footage. Codec specialist Jan Ozer compares the efficiency, implementation issues, and costs of …

Here’s the description; download handout here. SME-2019 – FFmpeg Hardware VES101. Benchmarking FFmpeg’s Hardware Codecs Tuesday, May 7: 10:30 a.m. – 11:30 a.m. Hardware codecs in FFmpeg like those from Intel and NVIDIA deliver significant performance gains over x264/x265, but have a reputation for lower quality and use a completely different command set. This session benchmarks the performance and quality of …

Embedded below is a free lesson from my course, Produce Videos with FFmpeg: The Beginner’s Course (http://bit.ly/learn_ffmpeg). The previous lesson in the course describes when you can use the -s command to set resolution; this lesson details your options when you can’t. This typically occurs when the display aspect ratio of your output is different from your input, which happens often …

I just finished my Produce Videos with FFmpeg course which I recorded with Camtasia, edited in Adobe Premiere Pro, and output in the Adobe Media Encoder (AME). I outputted from AME at about 10 Mbps to ensure quality, but now I’m left with 3 GB of files to upload. I know the data rate is unnecessarily high, but AME doesn’t …

A recent consulting project involved computing the VMAF, SSIM, and PSNR scores of 30 fps 480p video encoded from a 60 fps 1080p source file. I’ve not performed measurements like this in the past and assumed that simply converting the 60 fps sources file to 30 fps via the “-r” option would convert from 60 fps to 30 fps and …