View Single Post
Old 11th July 2019, 21:58   #6  |  Link
FranceBB
Broadcast Encoder
 
FranceBB's Avatar
 
Join Date: Nov 2013
Location: Royal Borough of Kensington & Chelsea, UK
Posts: 2,883
25p should be accepted and it shouldn't speed the video up by 50%.
Encode a few minutes like so by only using an indexer:

x264 --bitrate 25000 --preset veryslow --tune film --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 25 --open-gop --slices 4 --pulldown double --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 1 -o "out.264" "AVS_Script.avs"

x264 --bitrate 25000 --preset veryslow --tune film --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 25 --open-gop --slices 4 --pulldown double --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 2 -o "out.264" "AVS_Script.avs"

Otherwise, with Avisynth you can do something like:

Code:
ConvertFPS(50)
assumeTFF()
separatefields()
selectevery(4,0,3)
weave()
and then encode everything as 25i:

x264 --bitrate 25000 --preset veryslow --tune film --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 25 --open-gop --slices 4 --tff --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 1 -o "out.264" "AVS_Script.avs"

x264 --bitrate 25000 --preset veryslow --tune film --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 25 --open-gop --slices 4 --tff --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 2 -o "out.264" "AVS_Script.avs"


Last but not least, you can try 50p by using FFMpegSource2 as indexer and setting fpsnum 50000, fpsden 1000 like so:

Code:
FFMpegSource2("source.m2ts", fpsnum=50000, fpsden=1000, atrack=-1)
and then encode everything as 50p:

x264 --bitrate 25000 --preset veryslow --tune film --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 50 --open-gop --slices 4 --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 1 -o "out.264" "AVS_Script.avs"

x264 --bitrate 25000 --preset veryslow --tune film --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --keyint 50 --open-gop --slices 4 --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1 --pass 2 -o "out.264" "AVS_Script.avs"

Last edited by FranceBB; 11th July 2019 at 22:01.
FranceBB is online now   Reply With Quote