#5037: WEBM VP8 & VP9 - 2-pass encoding does not work
-------------------------------------+-------------------------------------
Reporter: solidghost | Type: defect
Status: new | Priority: normal
Component: ffmpeg | Version:
Keywords: | unspecified
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
'''Summary:'''
2-pass encoding does not work when using libvpx-vp9 & libvpx. The output
always says ''"Output file is empty, nothing was encoded"'', when the
first pass is complete. Then it continues with the second pass.
The finished file does not seem to have used information from the first
pass because the final bitrate is far from the specified one. Also the
quality distribution is far from good.
'''This is the code string:'''
{{{
ffmpeg -y -i Input.mov -vcodec libvpx-vp9 -f rawvideo -pix_fmt yuv420p
-aspect 16:9 -b:v 220k -vminrate 50k -s 420x236 -g 100 -qmin 0 -qmax 63
-an -pass 1 /dev/null && \
ffmpeg -y -i Input.mov -vcodec libvpx-vp9 -f webm -pix_fmt yuv420p -aspect
16:9 -b:v 220k -vminrate 50k -s 420x236 -g 100 -qmin 0 -qmax 63 -an -pass
2 \ out.webm
}}}
'''FFMPEG Output from the Terminal:'''
{{{
Thomas-MacBook-Pro:NEW_ONLINE_SETTINGS Thomas$ ffmpeg -y -i raw.mov
-vcodec libvpx-vp9 -f rawvideo -pix_fmt yuv420p -aspect 16:9 -b:v 220k
-vminrate 50k -s 420x236 -g 100 -qmin 0 -qmax 63 -an -pass 1 /dev/null &&
\
> ffmpeg -y -i raw.mov -vcodec libvpx-vp9 -f webm -pix_fmt yuv420p -aspect
16:9 -b:v 220k -vminrate 50k -s 420x236 -g 100 -qmin 0 -qmax 63 -an -pass
2 \ out.webm
ffmpeg version 2.8 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 7.0.0 (clang-700.0.72)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8 --enable-shared
--enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables
--enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-
opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc
--enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx
--enable-libass --enable-ffplay --enable-libfdk-aac --enable-libopus
--enable-libquvi --enable-libx265 --enable-nonfree --enable-vda
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'raw.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2015-11-23 13:44:32
Duration: 00:00:30.00, start: 0.000000, bitrate: 224330 kb/s
Stream #0:0(eng): Video: qtrle (rle / 0x20656C72), rgb24, 720x576,
222782 kb/s, SAR 35:24 DAR 175:96, 25 fps, 25 tbr, 25 tbn, 25 tbc
(default)
Metadata:
creation_time : 2015-11-23 13:44:32
handler_name : Apple Alias Data Handler
encoder : Animation
timecode : 00:00:00:00
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s (default)
Metadata:
creation_time : 2015-11-23 13:44:32
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 2015-11-23 13:44:40
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
[libvpx-vp9 @ 0x7f95a200b800] v1.4.0
Output #0, rawvideo, to '/dev/null':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf56.40.101
Stream #0:0(eng): Video: vp9 (libvpx-vp9), yuv420p, 420x236 [SAR
944:945 DAR 16:9], q=0-63, pass 1, 220 kb/s, 25 fps, 25 tbn, 25 tbc
(default)
Metadata:
creation_time : 2015-11-23 13:44:32
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
encoder : Lavc56.60.100 libvpx-vp9
Stream mapping:
Stream #0:0 -> #0:0 (qtrle (native) -> vp9 (libvpx-vp9))
Press [q] to stop, [?] for help
frame= 750 fps=134 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Output file is empty, nothing was encoded
ffmpeg version 2.8 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 7.0.0 (clang-700.0.72)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8 --enable-shared
--enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables
--enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-
opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc
--enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx
--enable-libass --enable-ffplay --enable-libfdk-aac --enable-libopus
--enable-libquvi --enable-libx265 --enable-nonfree --enable-vda
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'raw.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2015-11-23 13:44:32
Duration: 00:00:30.00, start: 0.000000, bitrate: 224330 kb/s
Stream #0:0(eng): Video: qtrle (rle / 0x20656C72), rgb24, 720x576,
222782 kb/s, SAR 35:24 DAR 175:96, 25 fps, 25 tbr, 25 tbn, 25 tbc
(default)
Metadata:
creation_time : 2015-11-23 13:44:32
handler_name : Apple Alias Data Handler
encoder : Animation
timecode : 00:00:00:00
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s (default)
Metadata:
creation_time : 2015-11-23 13:44:32
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 2015-11-23 13:44:40
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
[libvpx-vp9 @ 0x7f849401bc00] v1.4.0
Output #0, webm, to ' out.webm':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf56.40.101
Stream #0:0(eng): Video: vp9 (libvpx-vp9), yuv420p, 420x236 [SAR
944:945 DAR 16:9], q=0-63, pass 2, 220 kb/s, 25 fps, 1k tbn, 25 tbc
(default)
Metadata:
creation_time : 2015-11-23 13:44:32
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
encoder : Lavc56.60.100 libvpx-vp9
Stream mapping:
Stream #0:0 -> #0:0 (qtrle (native) -> vp9 (libvpx-vp9))
Press [q] to stop, [?] for help
frame= 750 fps= 13 q=0.0 Lsize= 844kB time=00:00:30.00 bitrate=
230.4kbits/s
video:838kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.744376%
Thomas-MacBook-Pro:NEW_ONLINE_SETTINGS Thomas$
}}}
ffmpeg version 2.8 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 7.0.0 (clang-700.0.72)
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5037>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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