Hi all,
I’d like to use ffprobe to output information about the streams of a source
file and libavfilter metadata at the same time. Is this possible?
If I use a filterchain as the input I can get frame metadata from libavfilter
such as:
ffprobe -f lavfi -i "movie=example.mkv,signalstats" -show_frames -show_streams
-of xml
ffprobe version N-42845-g7ab37ca Copyright (c) 2007-2016 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-libvo-aacenc --enable-libxvid
--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. 13.100 / 55. 13.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 23.100 / 6. 23.100
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
<?xml version="1.0" encoding="UTF-8"?>
<ffprobe>
Input #0, lavfi, from 'movie=example.mkv,signalstats':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: rawvideo (444P / 0x50343434), yuv444p, 720x480 [SAR 1:1
DAR 3:2], 1k tbr, 1k tbn, 1k tbc
<frames>
<frame media_type="video" stream_index="0" key_frame="1" pkt_pts="0"
pkt_pts_time="0.000000" pkt_dts="0" pkt_dts_time="0.000000"
best_effort_timestamp="0" best_effort_timestamp_time="0.000000" pkt_pos="761"
pkt_size="1036800" width="720" height="480" pix_fmt="yuv444p"
sample_aspect_ratio="1:1" pict_type="I" coded_picture_number="0"
display_picture_number="0" interlaced_frame="0" top_field_first="0"
repeat_pict="0">
<tag key="lavfi.signalstats.YMIN" value="18"/>
<tag key="lavfi.signalstats.YLOW" value="97"/>
<tag key="lavfi.signalstats.YAVG" value="145.97"/>
<tag key="lavfi.signalstats.YHIGH" value="170"/>
<tag key="lavfi.signalstats.YMAX" value="234"/>
<tag key="lavfi.signalstats.UMIN" value="19"/>
<tag key="lavfi.signalstats.ULOW" value="90"/>
<tag key="lavfi.signalstats.UAVG" value="140.07"/>
<tag key="lavfi.signalstats.UHIGH" value="166"/>
<tag key="lavfi.signalstats.UMAX" value="233"/>
<tag key="lavfi.signalstats.VMIN" value="16"/>
<tag key="lavfi.signalstats.VLOW" value="87"/>
<tag key="lavfi.signalstats.VAVG" value="148.122"/>
<tag key="lavfi.signalstats.VHIGH" value="174"/>
<tag key="lavfi.signalstats.VMAX" value="239"/>
<tag key="lavfi.signalstats.SATMIN" value="1"/>
<tag key="lavfi.signalstats.SATLOW" value="25"/>
<tag key="lavfi.signalstats.SATAVG" value="46.8093"/>
<tag key="lavfi.signalstats.SATHIGH" value="60"/>
<tag key="lavfi.signalstats.SATMAX" value="118"/>
<tag key="lavfi.signalstats.HUEMED" value="210"/>
<tag key="lavfi.signalstats.HUEAVG" value="197.44"/>
<tag key="lavfi.signalstats.YDIF" value="0"/>
<tag key="lavfi.signalstats.UDIF" value="0"/>
<tag key="lavfi.signalstats.VDIF" value="0"/>
</frame>
</frames>
<streams>
<stream index="0" codec_name="rawvideo" codec_long_name="raw video"
codec_type="video" codec_time_base="1/1000" codec_tag_string="444P"
codec_tag="0x50343434" width="720" height="480" coded_width="720"
coded_height="480" has_b_frames="0" sample_aspect_ratio="1:1"
display_aspect_ratio="3:2" pix_fmt="yuv444p" level="-99" refs="1"
r_frame_rate="1000/1" avg_frame_rate="0/0" time_base="1/1000" start_pts="0"
start_time="0.000000" nb_read_frames="1">
<disposition default="0" dub="0" original="0" comment="0"
lyrics="0" karaoke="0" forced="0" hearing_impaired="0" visual_impaired="0"
clean_effects="0" attached_pic="0"/>
</stream>
</streams>
</ffprobe>
Here I get the frame metadata output but the stream metadata reflects the
output of the movie filter (rawvideo) rather than information about the streams
of the source file.
If I use the source file directly as an input, then I can not apply a filter as
ffprobe doesn’t support -vf or -filter_complex.
ffprobe -i movie=example.mkv -vf signalstats -show_frames -show_streams -of xml
ffprobe version N-42845-g7ab37ca Copyright (c) 2007-2016 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-libvo-aacenc --enable-libxvid
--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. 13.100 / 55. 13.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 23.100 / 6. 23.100
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
Failed to set value 'signalstats' for option 'vf': Option not found
If I try to use both a filterchain as an input and the source file as another
input, I have an error as only one input is supported in ffprobe.
ffprobe -i movie=example.mkv -f lavfi movie=example.mkv,signalstats
-show_frames -show_streams -of xml
ffprobe version N-42845-g7ab37ca Copyright (c) 2007-2016 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-libvo-aacenc --enable-libxvid
--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. 13.100 / 55. 13.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 23.100 / 6. 23.100
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
Argument 'movie=example.mkv,signalstats' provided as input filename, but
'movie=example.mkv' was already specified.
Is it feasible (now or with sponsorship) to have a single ffprobe output that
contains metadata about both the source file’s streams and the metadata output
of filters (such as signalstats, cropdetect) applied to the frames?
Best Regards,
Dave Rice
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