Kdenlive - MP4 mainstream - H264 / AAC

Yet another MP4 profile for Kdenlive. For more than a decade, the combination of H264 video and AAC audio codecs was the way-to-go for media broadcast on the Internet. Considering mainstream content, it still offers a decent solution for either storage or streaming, with good overall performances.

Using the 'YouTube' preset from MLT, compression is much more aggressive for video than audio tracks. That is why I slightly decreased two values:
1. 'crf' (constant rate factor), thus increasing the visual quality;
2. 'ab' (audio bitrate), as most recording software do not make any use of such a high value anyway.

Last but not least, please note that this rendering profile is calibrated by default for high frame rate footage compliant to the PAL standard (g=25 for 50 fps). For other frame rates, feel free to play with the in-app 'quality' slider to make sure that the 'g' (group of pictures) value equals half the sources frame rate (i.e. g=12 for 24 fps; g=15 for 30; g=30 for 60).

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