> 在 2019年11月22日，17:30，Gyan <ffm...@gyani.pro> 写道：
>
>
>
> On 22-11-2019 02:26 pm, Steven Liu wrote:
>> Signed-off-by: Steven Liu <l...@chinaffmpeg.org>
>> ---
>> fftools/cmdutils.c | 17 +++++++++++++++++
>> 1 file changed, 17 insertions(+)
>>
>> diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
>> index 84f98b7c04..fe18093ce1 100644
>> --- a/fftools/cmdutils.c
>> +++ b/fftools/cmdutils.c
>> @@ -1870,6 +1870,21 @@ static void show_help_demuxer(const char *name)
>> show_help_children(fmt->priv_class, AV_OPT_FLAG_DECODING_PARAM);
>> }
>> +static void show_help_protocol(const char *name)
>> +{
>> + const URLProtocol *proto = av_find_protocol_by_name(name);;
>> +
>> + if (!proto) {
>> + av_log(NULL, AV_LOG_ERROR, "Unknown protocol '%s'.\n", name);
>> + return;
>> + }
>> +
>> + printf("Protocol %s:\n", name);
>> +
>> + if (proto->priv_data_class)
>> + show_help_children(proto->priv_data_class,
>> AV_OPT_FLAG_DECODING_PARAM);
>> +}
>
> Protocols may be employed for output as well. Is there a separate option for
> those protocol options?
after patch:
liuqideMBP:dash liuqi$ ./ffmpeg -h protocol=rtmp
ffmpeg version N-95813-g5353723f20 Copyright (c) 2000-2019 the FFmpeg developers
built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
configuration: --enable-fontconfig --enable-gpl --enable-libass
--enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libspeex
--enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-version3
--enable-nonfree --enable-videotoolbox --enable-libxml2 --samples=fate-suite/
--enable-libopencv --enable-libopus
libavutil 56. 36.100 / 56. 36.100
libavcodec 58. 62.100 / 58. 62.100
libavformat 58. 35.101 / 58. 35.101
libavdevice 58. 9.101 / 58. 9.101
libavfilter 7. 66.100 / 7. 66.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Protocol rtmp:
rtmp AVOptions:
-rtmp_app <string> ED........ Name of application to connect to
on the RTMP server
-rtmp_buffer <int> ED........ Set buffer time in milliseconds.
The default is 3000. (from 0 to INT_MAX) (default 3000)
-rtmp_conn <string> ED........ Append arbitrary AMF data to the
Connect message
-rtmp_flashver <string> ED........ Version of the Flash plugin used
to run the SWF player.
-rtmp_live <int> .D........ Specify that the media is a live
stream. (from INT_MIN to INT_MAX) (default any)
any -2 .D........ both
live -1 .D........ live stream
recorded 0 .D........ recorded stream
-rtmp_pageurl <string> .D........ URL of the web page in which the
media was embedded. By default no value will be sent.
-rtmp_playpath <string> ED........ Stream identifier to play or to
publish
-rtmp_subscribe <string> .D........ Name of live stream to subscribe
to. Defaults to rtmp_playpath.
-rtmp_swfhash <binary> .D........ SHA256 hash of the decompressed
SWF file (32 bytes).
-rtmp_swfsize <int> .D........ Size of the decompressed SWF file,
required for SWFVerification. (from 0 to INT_MAX) (default 0)
-rtmp_swfurl <string> ED........ URL of the SWF player. By default
no value will be sent
-rtmp_swfverify <string> .D........ URL to player swf file, compute
hash/size automatically.
-rtmp_tcurl <string> ED........ URL of the target stream. Defaults
to proto://host[:port]/app.
-rtmp_listen <int> .D........ Listen for incoming rtmp
connections (from INT_MIN to INT_MAX) (default 0)
-listen <int> .D........ Listen for incoming rtmp
connections (from INT_MIN to INT_MAX) (default 0)
-timeout <int> .D........ Maximum timeout (in seconds) to
wait for incoming connections. -1 is infinite. Implies -rtmp_listen 1 (from
INT_MIN to INT_MAX) (default -1)
before patch:
liuqideMBP:dash liuqi$
liuqideMBP:dash liuqi$
liuqideMBP:dash liuqi$ ffmpeg -h protocol=rtmp
ffmpeg version N-95812-gd73f062706 Copyright (c) 2000-2019 the FFmpeg developers
built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
configuration: --enable-fontconfig --enable-gpl --enable-libass
--enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libspeex
--enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-version3
--enable-nonfree --enable-videotoolbox --enable-libxml2 --samples=fate-suite/
--enable-libopencv
libavutil 56. 36.100 / 56. 36.100
libavcodec 58. 62.100 / 58. 62.100
libavformat 58. 35.100 / 58. 35.100
libavdevice 58. 9.101 / 58. 9.101
libavfilter 7. 66.100 / 7. 66.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Unknown help option 'protocol'.
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options]
outfile}...
Getting help:
-h -- print basic options
-h long -- print more options
-h full -- print all options (including all format and codec specific
options, very long)
-h type=name -- print all options for the named
decoder/encoder/demuxer/muxer/filter/bsf
See man ffmpeg for detailed description of the options.
Print help / information / capabilities:
-L show license
-h topic show help
-? topic show help
-help topic show help
--help topic show help
-version show version
-buildconf show build configuration
-formats show available formats
-muxers show available muxers
-demuxers show available demuxers
-devices show available devices
-codecs show available codecs
-decoders show available decoders
-encoders show available encoders
-bsfs show available bit stream filters
-protocols show available protocols
-filters show available filters
-pix_fmts show available pixel formats
-layouts show standard channel layouts
-sample_fmts show available audio sample formats
-colors show available color names
-sources device list sources of the input device
-sinks device list sinks of the output device
-hwaccels show available HW acceleration methods
Global options (affect whole program instead of just one file:
-loglevel loglevel set logging level
-v loglevel set logging level
-report generate a report
-max_alloc bytes set maximum size of a single allocated block
-y overwrite output files
-n never overwrite output files
-ignore_unknown Ignore unknown stream types
-filter_threads number of non-complex filter threads
-filter_complex_threads number of threads for -filter_complex
-stats print progress report during encoding
-max_error_rate maximum error rate ratio of errors (0.0: no errors, 1.0: 100%
errors) above which ffmpeg returns an error instead of success.
-bits_per_raw_sample number set the number of bits per raw sample
-vol volume change audio volume (256=normal)
Per-file main options:
-f fmt force format
-c codec codec name
-codec codec codec name
-pre preset preset name
-map_metadata outfile[,metadata]:infile[,metadata] set metadata information of
outfile from infile
-t duration record or transcode "duration" seconds of audio/video
-to time_stop record or transcode stop time
-fs limit_size set the limit file size in bytes
-ss time_off set the start time offset
-sseof time_off set the start time offset relative to EOF
-seek_timestamp enable/disable seeking by timestamp with -ss
-timestamp time set the recording timestamp ('now' to set the current time)
-metadata string=string add metadata
-program title=string:st=number... add program with specified streams
-target type specify target file type ("vcd", "svcd", "dvd", "dv" or
"dv50" with optional prefixes "pal-", "ntsc-" or "film-")
-apad audio pad
-frames number set the number of frames to output
-filter filter_graph set stream filtergraph
-filter_script filename read stream filtergraph description from a file
-reinit_filter reinit filtergraph on input parameter changes
-discard discard
-disposition disposition
Video options:
-vframes number set the number of video frames to output
-r rate set frame rate (Hz value, fraction or abbreviation)
-s size set frame size (WxH or abbreviation)
-aspect aspect set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)
-bits_per_raw_sample number set the number of bits per raw sample
-vn disable video
-vcodec codec force video codec ('copy' to copy stream)
-timecode hh:mm:ss[:;.]ff set initial TimeCode value.
-pass n select the pass number (1 to 3)
-vf filter_graph set video filters
-ab bitrate audio bitrate (please use -b:a)
-b bitrate video bitrate (please use -b:v)
-dn disable data
Audio options:
-aframes number set the number of audio frames to output
-aq quality set audio quality (codec-specific)
-ar rate set audio sampling rate (in Hz)
-ac channels set number of audio channels
-an disable audio
-acodec codec force audio codec ('copy' to copy stream)
-vol volume change audio volume (256=normal)
-af filter_graph set audio filters
Subtitle options:
-s size set frame size (WxH or abbreviation)
-sn disable subtitle
-scodec codec force subtitle codec ('copy' to copy stream)
-stag fourcc/tag force subtitle tag/fourcc
-fix_sub_duration fix subtitles duration
-canvas_size size set canvas size (WxH or abbreviation)
-spre preset set the subtitle options to the indicated preset
liuqideMBP:dash liuqi$
>
>> +
>> static void show_help_muxer(const char *name)
>> {
>> const AVCodecDescriptor *desc;
>> @@ -2000,6 +2015,8 @@ int show_help(void *optctx, const char *opt, const
>> char *arg)
>> show_help_demuxer(par);
>> } else if (!strcmp(topic, "muxer")) {
>> show_help_muxer(par);
>> + } else if (!strcmp(topic, "protocol")) {
>> + show_help_protocol(par);
>> #if CONFIG_AVFILTER
>> } else if (!strcmp(topic, "filter")) {
>> show_help_filter(par);
>
> Regards,
> Gyan
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Thanks
Steven
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