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Hardware VS software .mp4 encoding: is that normal?

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  • Hardware VS software .mp4 encoding: is that normal?

    Sorry for the messy screen grabs, they come from 50i .mp4 exports so they show the well known comb effect.
    Apart of that, I've noticed just few hours ago that hardware encoding via QSync is very fast but ends up with awfully pixelated clips, especially with random fine detail or complex water waves motion.
    And it's not a matter of bandwidth allocated, I tested two .mp4 exports with the same VBR (9.5M - 15M, Superfine) where the only difference is the hardware encoding option checked/unchecked.

    Sad because the excellent sw encoding takes up to 25-30 mins for exporting, say, 13 minutes of 1080 50i video to an .mp4 file while hw encoding outputs the same content in 6-7 minutes...
    Is this huge quality difference normal or should I set some proper .mp4 encoding option to improve my hardware-encoded .mp4 exports?

    First grab: hw encoding, second grab: NO hw encoding.

    Rafting QSync.jpg Rafting NO QSync.jpg

    My laptop: Acer Travelmate P259-G2-MG
    Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz - 2.90 GHz x64-based
    RAM 8,00 GB
    Graphics card 1: NVIDIA GeForce 940MX
    Graphics card 2: Intel(R) HD Graphics 620
    Windows 10 Pro 20H2 64 bit, Build 19042.985 (latest update)
    Sw: Edius X Pro v.10.10

  • #2
    the quality of software encode at low bitrates is better and with right PC, just as fast as QS export (a 13min 1080i export would take me no more than 5min with all 32cores at 100%)

    with QS, I would try constant bitrate with 15-18M as minimum (VBR can do strange things with QS)
    Anton Strauss
    Antons Video Productions - Sydney

    EDIUS X WG with BM Mini Monitor 4k and BM Mini Recorder, Gigabyte X299 UD4 Pro, Intel Core i9 9960X 16 Core, 32 Threads @ 4.3Ghz, Corsair Water Cooling, Gigabyte RTX-2070 Super 3X 8GB Video Card, Samsung 860 Pro 512GB SSD for System, 8TB Samsung Raid0 SSD for Video, 2 Pioneer BDR-209 Blu-ray/DVD burners, Hotswap Bay for 3.5" Sata and 2.5" SSD, Phanteks Enthoo Pro XL Tower, Corsair 32GB DDR4 Ram, Win10 Pro 21H2