diff options
Diffstat (limited to 'localvideowebencode')
| -rwxr-xr-x | localvideowebencode | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/localvideowebencode b/localvideowebencode index 75dfcdb..1f22272 100755 --- a/localvideowebencode +++ b/localvideowebencode @@ -154,7 +154,7 @@ html favoring open formats with optional non-JavaScript Flash fallback. hq high exact slow 2xCQ¹ exact medium exact slow 2xCQ¹ quality medium vary medium Q² - ¹ avc uses 1-pass + ¹ theora uses CBR, avc uses 1-pass ² vp8 uses "soft-CQ" (CQ with very high bitrate) (default: normal) --quality Quality rate factor: auto [integer] none @@ -227,6 +227,10 @@ compression=normal # 5) optionally pick dirty/hq settings # * check that --compression=quality has similar filesize as normal +# Theora seems to compress ~100% worse than H.264 +# (reportedly 76% worse in 2010, and libtheora has not improved since) +# <http://compression.ru/video/codec_comparison/h264_2010/> +factor_theora=200/100 # VP8 is rumored to compress ~20% worse than H.264 factor_vp8=120/100 # VP9 compresses ~30% better than H.264 for practical use-cases @@ -307,7 +311,7 @@ qkey_theora=q qkey_vp8=crf qkey_vp9=crf qkey_avc=crf -q_theora=5 +q_theora=6 q_vp8=33 cpu_vp8=2 q_vp9=33 @@ -321,16 +325,14 @@ case "$compression" in normal) :;; dirty) gpu=${gpu:-auto} - q_theora=1 cpu_vp8=4 cpu_vp9=4 preset_avc=veryfast ;; hq) multipass=yes - no_multipass_theora=yes # TODO: try with ffmpeg2theora + no_q_theora=yes no_multipass_avc=yes - q_theora=6 cpu_vp8=0 cpu_vp9=1 preset_avc=veryslow @@ -534,7 +536,7 @@ fi if [ -n "$_pixels" ] && [ -n "$_frames" ]; then bitrate_avc=$(perl -E '$refsize=640*360;' \ -E "say int( +(($_pixels/\$refsize)**0.75*\$refsize*$_frames*$refbpp) )") - bitrate_theora=$bitrate_avc # FIXME + bitrate_theora=$(perl -E "say int( +($bitrate_avc*$factor_theora) )") #" bitrate_vp8=$(perl -E "say int( +($bitrate_avc*$factor_vp8) )") #" bitrate_vp9=$(perl -E "say int( +($bitrate_avc*$factor_vp9) )") #" fi @@ -720,8 +722,8 @@ _ffmpeg_misc_avc="${no_gpu:+ -movflags +faststart}" # format options # emulate VP8 Constant Quality using "loose" Constrained Quality -_melt_theora="vcodec=libtheora$_melt_bitrate_theora $qkey_theora=$q_theora" -_ffmpeg_theora="-c:v libtheora$_ffmpeg_bitrate_theora -$qkey_theora:v $q_theora" +_melt_theora="vcodec=libtheora$_melt_bitrate_theora${q_theora:+ $qkey_theora=$q_theora}" +_ffmpeg_theora="-c:v libtheora$_ffmpeg_bitrate_theora${q_theora:+ -$qkey_theora:v $q_theora}" _melt_vp8="vcodec=$encoder_vp8${pre_vp8:+ vpreset=$pre_vp8}${preset_vp8:+ preset=$preset_vp8}$_melt_bitrate_vp8${q_vp8:+ ${no_bitrate_vp8:+vb=$((bitrate_vp8*10)) }$qkey_vp8=$q_vp8}$_melt_misc_vp8" _ffmpeg_vp8="-c:v $encoder_vp8${pre_vp8:+ -vpre $pre_vp8}${preset_vp8:+ preset $preset_vp8}$_ffmpeg_bitrate_vp8${q_vp8:+ ${no_bitrate_vp8:+-b:v $((bitrate_vp8*10)) }-$qkey_vp8 $q_vp8}$_ffmpeg_misc_vp8" _vpxenc_vp8="--codec=vp8$_vpxenc_bitrate_vp8 --end-usage=${no_q_vp8:+vbr}${q_vp8:+cq --cq-level=$q_vp8}$_vpxenc_misc_vp8" @@ -791,6 +793,8 @@ fi if [ -n "${ogv:+$multipass_theora}${webm:+$multipass_vp8}${webm_vp9:+$multipass_vp9}${mp4:+$multipass_avc}" ]; then echo >&2 "Analyzing video complexity..." render melt $_melt_infiles $filters \ + ${ogv:+${use_melt_theora:+-consumer avformat:$stem.ogv $_melt_ogv \ + pass=1 passlogfile=${stem}_theora}} \ ${webm:+${use_melt_vp8:+-consumer avformat:$stem.webm $_melt_webm \ pass=1 passlogfile=${stem}_vp8}} \ ${webm_vp9:+${use_melt_vp9:+-consumer avformat:${stem}_vp9.webm $_melt_webm_vp9 \ |