Update 3: As a rule of thumb, I usually encode 1080p 10Mbps, 720p 5Mbps, and 480p 2.5Mbps. If you ever want to manually set the profile and level, the options to pass in is: -profile:v PROFILE -level:v LEVEL (More details at FFmpeg and x264 Encoding Guide) Therefore I’ll be switching back to using the default preset. The file size is a bit bigger, but change in quality is unnoticeable. After looking into this, I’ve discovered that by using the the veryslow preset, it was using for 480p encodes, for 720p encodes, and for 1080p encodes.īy using the default preset, it will use for 480p encodes, for 720p encodes, and for 1080p encodes. Update 2: has brought to my attention that my new encodes are using a newer H.264 profile which won’t stream on the PS3. Update 1: Emmgunn from mp4tools has gotten back to me and apparently the culprit is the version of ffmpeg that comes with mp4tools and its inability to handle dtshdma audio streams. No guarantees on when they’ll all be fixed. I’ll try and find some time to fix the existing bad encodes. Here’s what the audio channels look like in Audacity when encoded properly: I’ve created a bash alias that does the following:įfmpeg -i "$1" -y -vcodec libx264 -crf 18.0 -preset veryslow -vf "scale=852:trunc(ow/a/2)*2" -acodec libfaac -ab 384k -ac 6 -f mp4 "$-480p-HDTN.mp4" means that the output file name should use the original filename, but drop the extension while appending -480p-HDTN.mp4 In the mean time, I’ve been learning and playing with ffmpeg and I’ve come across a set of options that seem to do the trick. ![]() Here’s what the 6 channels look like if you open the mp4tools encoded file in Audacity: I’ve already reported the issue to the creator of mp4tools (the utility which I’ve been using to re-encode the raw files). It has come to our attention that many of our trailers with 5.1 audio were improperly encoded where it only included the left, right, and center channels, omitting the rear-left, rear-right, and subwoofer channels.
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