« Changelog History


Video Transcoding v0.18.0 Release Notes

  • Saturday, December 2, 2017

    • 👌 Improve the average bitrate (ABR) ratecontrol system provided by the --abr option in transcode-video. Via #179.
      • Implement it with a maximum bitrate constraint to raise its overal quality level and guarantee that it will not generate any VBV underflow warnings like the default ratecontrol system.
      • Signal Hypothetical Reference Decoder (HRD) information, meaning that the VBV maximum bitrate value is added as metadata to the output video, something you should not do when using the default ratecontrol system.
      • Move it from the "Advanced" to the "Quality" section in the --help output and describe its quality output as "different" rather than "lower" compared to the default ratecontrol system.
      • Also remove the no-longer valid characterization of ABR in the "Explanation" section of the "README" document.
    • 🚚 Deprecate the poorly named --cvbr and --vbr options in transcode-video and remove them from the --help output.
      • The ratecontrol system implemented by the --cvbr option was always experimental. After much testing, it was found to be noticeably lower in quality compared to the default and to the new ABR implementation.
      • The ratecontrol system implemented by the --vbr option was only ever intended for comparison testing. And probably used only by myself.
    • Modify transcode-video to no longer re-calculate vbv-bufsize based on any user input value for vbv-maxrate. Instead, always calculate both vbv-maxrate and vbv-bufsize based on the target video bitrate.
    • 🚚 Deprecate the --player option in detect-crop and remove it from the --help output.
    • 🛠 Fix failure of subtitle detection for HandBrake nightly builds. Language detection for subtitles in disc image directory input and individual closed caption tracks may still be wrong but will not be fixed at this time. Via #172.
    • Mention Nick Wronski's nifty batch-processing wrapper for transcode-video in the the "README" document. Thanks, @JMoVS! Via #180.