[FFmpeg-trac] #5229(undetermined:new): movie filter does not accept pipe protocol as input
FFmpeg
trac at avcodec.org
Thu Feb 11 06:17:26 CET 2016
#5229: movie filter does not accept pipe protocol as input
-------------------------------------+-------------------------------------
Reporter: dericed | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: git- | undetermined
master | Keywords: movie, pipe
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
-------------------------------------+-------------------------------------
Summary of the bug:
The movie filter defines the 'filename' argument with: "The name of the
resource to read (not necessarily a file; it can also be a device or a
stream accessed through some protocol)."
I would like to have the movie filter access the input from a pipe, but
the pipe protocol doesn't appear to work in the movie filter.
How to reproduce:
The ffmpeg is simply used here to produce an output to pipe. ffplay should
access the pipe in the movie filter but it provides an error.
{{{
ffmpeg -f lavfi -i mandelbrot -c copy -f nut - | ffplay -f lavfi
"movie=pipe:0"
ffmpeg version N-43483-gac5a4de Copyright (c) 2000-2016 the FFmpeg
developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --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-libxvid --enable-
libfontconfig --enable-libfreetype --enable-libfaac --enable-libass
--enable-ffplay --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-
cflags=-I/usr/local/Cellar/openjpeg/1.5.2_1/include/openjpeg-1.5 --enable-
nonfree --enable-vda
libavutil 55. 17.100 / 55. 17.100
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
ffplay version N-43483-gac5a4de Copyright (c) 2003-2016 the FFmpeg
developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --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-libxvid --enable-
libfontconfig --enable-libfreetype --enable-libfaac --enable-libass
--enable-ffplay --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-
cflags=-I/usr/local/Cellar/openjpeg/1.5.2_1/include/openjpeg-1.5 --enable-
nonfree --enable-vda
libavutil 55. 17.100 / 55. 17.100
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[Parsed_movie_0 @ 0x7febf2c44e20] Failed to avformat_open_input 'pipe'
[lavfi @ 0x7febf3081a00] Error initializing filter 'movie' with args
'pipe:0'
movie=pipe:0: No such file or directory
Input #0, lavfi, from 'mandelbrot':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: rawvideo (RGB[0] / 0x424752), rgb0, 640x480 [SAR
1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
Output #0, nut, to 'pipe:':
Metadata:
encoder : Lavf57.25.100
Stream #0:0: Video: rawvideo (RGB[0] / 0x424752), rgb0, 640x480 [SAR
1:1 DAR 4:3], q=2-31, 25 tbr, 51200 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
}}}
This example is the same except that the sdterr output of ffmpeg is
redirected to distinguish the two processes:
{{{
ffmpeg -f lavfi -i mandelbrot -c copy -f nut - 2>/dev/null | ffplay -f
lavfi "movie=pipe:0"
ffplay version N-43483-gac5a4de Copyright (c) 2003-2016 the FFmpeg
developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --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-libxvid --enable-
libfontconfig --enable-libfreetype --enable-libfaac --enable-libass
--enable-ffplay --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-
cflags=-I/usr/local/Cellar/openjpeg/1.5.2_1/include/openjpeg-1.5 --enable-
nonfree --enable-vda
libavutil 55. 17.100 / 55. 17.100
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[Parsed_movie_0 @ 0x7fc319458f20] Failed to avformat_open_input 'pipe'
[lavfi @ 0x7fc31a82a600] Error initializing filter 'movie' with args
'pipe:0'
movie=pipe:0: No such file or directory
}}}
The pipe protocol does work as a direct input:
{{{
ffmpeg -f lavfi -i mandelbrot -c copy -f nut - 2>/dev/null | ffplay -i
"pipe:0"
ffplay version N-43483-gac5a4de Copyright (c) 2003-2016 the FFmpeg
developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --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-libxvid --enable-
libfontconfig --enable-libfreetype --enable-libfaac --enable-libass
--enable-ffplay --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-
cflags=-I/usr/local/Cellar/openjpeg/1.5.2_1/include/openjpeg-1.5 --enable-
nonfree --enable-vda
libavutil 55. 17.100 / 55. 17.100
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, nut, from 'pipe:0':q= 0KB vq= 0KB sq= 0B f=0/0
Metadata:
encoder : Lavf57.25.100
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: rawvideo (RGB[0] / 0x424752), rgb0, 640x480, SAR
1:1 DAR 4:3, 25 fps, 25 tbr, 51200 tbn, 51200 tbc
1.10 M-V: -0.039 fd= 3 aq= 0KB vq=15601KB sq= 0B f=0/0
}}}
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5229>
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