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  1. Member
    Join Date: Jun 2014
    Location: Essex
    Search Comp PM
    Hi there

    I'm new to this forum so I hope I have the right location for this thread...

    I have a strange issue. When I use MPEG Streamclip to convert a single video to MP4 it runs absolutely fine and the video looks perfect. However, when I start a batch conversion of multiple videos in a list, I get all sorts of pixelation throughout the resulting MP4s. I am setting them to convert with exactly the same parameters but for some reason they are much worse quality. Particularly on transitions within the videos.

    I was just wondering if anyone had any idea why this may happen when doing big batches and not when done singly? I'm stumped!!

    Thanks in advance.
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  2. Member
    Join Date: Aug 2014
    Location: United States
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    I had the same issue's, well more a pixelization issues with all mp4/avc encoding. My target was minidlna serving to dish hopper/samsung blu-ray via dlna and mp4/avc's were un-watchable with ridiculous pixelization. This is what after dozens of test encodes I ended up with, it's very dish hopper'ish since that was my main target..

    Mpeg2 @ 23.976/2000br (frame/bit rates to high = stutter, low = pixelization). Audio AC3/2 ch which fixes some issues the hopper has with acc you may want better audio though, and finally in a mkv container. This gives me 1.5/2.0gb movies that stream great to my hopper & blu-ray. There is room to the push to the upside on quality but for the size/encode time I can not see the diff. I use Tencoder with this..

    "ffmpeg.exe" -y -itsoffset 0 -threads 8 -i "video.MP4" -vcodec mpeg2video -b:v 2000000 -r 23.976 -f matroska -map 0:0 -map 0:1 -acodec ac3 -ab 128k -af aresample=resampler=soxr -ar 44100 -ac 2 video.mkv"
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