From a8e7fb0c4d04e365c3a69f463608d0954c8111a2 Mon Sep 17 00:00:00 2001 From: Eugen Rochko Date: Tue, 19 Sep 2023 12:25:58 +0200 Subject: [PATCH] Change video bitrate to always fit within size limit (#26970) --- lib/paperclip/transcoder.rb | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/lib/paperclip/transcoder.rb b/lib/paperclip/transcoder.rb index b88cf662c2..ed5425a3b8 100644 --- a/lib/paperclip/transcoder.rb +++ b/lib/paperclip/transcoder.rb @@ -41,11 +41,14 @@ module Paperclip @output_options['vframes'] = 1 when 'mp4' unless eligible_to_passthrough?(metadata) - bitrate = (metadata.width * metadata.height * 30 * BITS_PER_PIXEL) / 1_000 - - @output_options['b:v'] = "#{bitrate}k" - @output_options['maxrate'] = "#{bitrate + 192}k" - @output_options['bufsize'] = "#{bitrate * 5}k" + size_limit_in_bits = MediaAttachment::VIDEO_LIMIT * 8 + desired_bitrate = (metadata.width * metadata.height * 30 * BITS_PER_PIXEL).floor + maximum_bitrate = (size_limit_in_bits / metadata.duration).floor - 192_000 # Leave some space for the audio stream + bitrate = [desired_bitrate, maximum_bitrate].min + + @output_options['b:v'] = bitrate + @output_options['maxrate'] = bitrate + 192_000 + @output_options['bufsize'] = bitrate * 5 if high_vfr?(metadata) @output_options['vsync'] = 'vfr'