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project:stereoscopy [2018/10/16 15:19]
dp [Stereoscopic recording using FFmpeg]
project:stereoscopy [2018/10/17 10:20] (current)
dp
Line 79: Line 79:
 <code> <code>
 ffmpeg -i LEFT.mp4 -i RIGHT.mp4 -filter_complex [0:v]scale=w=iw/2[left],[1:v]scale=w=iw/2[right],[left][right]framepack=sbs OUTPUT_SBS.mp4 ffmpeg -i LEFT.mp4 -i RIGHT.mp4 -filter_complex [0:v]scale=w=iw/2[left],[1:v]scale=w=iw/2[right],[left][right]framepack=sbs OUTPUT_SBS.mp4
 +</code>
 +</WRAP>
 +
 +Convert views into a top-above-bottom format:
 +<WRAP prewrap>
 +<code>
 +ffmpeg -i LEFT.mp4 -i RIGHT.mp4 -filter_complex framepack=tab OUTPUT_TAB.mp4
 </code> </code>
 </WRAP> </WRAP>
Line 87: Line 94:
 ffmpeg -i LEFT.mp4 -r 30 -vcodec libx264 -preset ultrafast -qp 0 LEFT_2.mp4 ffmpeg -i LEFT.mp4 -r 30 -vcodec libx264 -preset ultrafast -qp 0 LEFT_2.mp4
 ffmpeg -i RIGHT.mp4 -r 30 -vcodec libx264 -preset ultrafast -qp 0 RIGHT_2.mp4 ffmpeg -i RIGHT.mp4 -r 30 -vcodec libx264 -preset ultrafast -qp 0 RIGHT_2.mp4
 +</code>
 +</WRAP>
 +
 +===== Metadata for Youtube video uploads =====
 +Unfortunately none of the below recommended metadata work and Youtube is breaking things constantly. It might recognize stereoscopic/3D video in the computer browser (only anaglyph option) but it won't give the cardboard options on Youtube on smartphone. Additionally aspect ratio might be interpreted differently between computer and smartphone. It seems the best way for now is to prerender everything and bypass Youtube's unreliable/crappy 3d support. FIXME
 +
 +MPEG4 (with re-encoding):
 +<WRAP prewrap>
 +<code>
 +ffmpeg -i input_file.mp4 -vcodec libx264 -x264opts frame-packing=3 output_file.mp4
 +</code>
 +</WRAP>
 +
 +<WRAP prewrap>
 +<code>
 +ffmpeg -i input_file.mkv -vcodec libx264 -x264opts "frame-packing=3:frame-packing-interpret=1:frame-packing-quincunx=0:frame-packing-grid=0,0,0,0" output_file.mp4
 +</code>
 +</WRAP>
 +
 +Matroska (direct stream copy)
 +<WRAP prewrap>
 +<code>
 +ffmpeg -i input_file.mkv -c copy -metadata:s:v:0 stereo_mode=1 output_file.mkv
 +</code>
 +</WRAP>
 +
 +There is Google's tool for metadata injection but it also didn't work in this case.
 +https://github.com/google/spatial-media/
 +This fork is less strict and allows more operations: https://github.com/Vargol/spatial-media
 +
 +Add left-right (SBS) metadata:
 +<WRAP prewrap>
 +<code>
 +python spatialmedia -i --stereo=left-right INPUT.mp4 OUTPUT.mp4
 +</code>
 +</WRAP>
 +
 +Print spatial media metadata contained in the file:
 +<WRAP prewrap>
 +<code>
 +python spatialmedia FILE
 </code> </code>
 </WRAP> </WRAP>
project/stereoscopy.1539695946.txt.gz ยท Last modified: 2018/10/16 15:19 by dp