前言

本開發(fā)板具備高性能的ARM MPU+多媒體能力，特別適合多媒體終端開發(fā)。本篇就體驗搭建ffmpeg開發(fā)環(huán)境，并進(jìn)行性能測試，進(jìn)行視頻播放，演示網(wǎng)絡(luò)視頻播放器等。

02.

編譯過程

交叉編譯

下載代碼

git clonehttps://github.com/FFmpeg/FFmpeg.git

cd FFmpeg/

交叉編譯

./configure --cross-prefix=aarch64-linux-gnu- --enable-cross-compile --target-os=linux --cc=aarch64-linux-gnu-gcc --arch=arm64 --prefix=/home/lhj/opt/ffmpeg/board --enable-ffmpeg --disable-armv5te --disable-armv6 --disable-armv6t2

WARNING: aarch64-linux-gnu-pkg-config not found, library detection may fail.

make

make install

生成文件如下

lhj@lhj:~/FFmpeg$ tree /home/lhj/opt/ffmpeg/board/
/home/lhj/opt/ffmpeg/board/
|-- bin
| |-- ffmpeg
| `-- ffprobe
|-- include
| |-- libavcodec
| | |-- ac3_parser.h
| | |-- adts_parser.h
| | |-- avcodec.h
| | |-- avdct.h
| | |-- avfft.h
| | |-- bsf.h
| | |-- codec.h
| | |-- codec_desc.h
| | |-- codec_id.h
| | |-- codec_par.h
| | |-- d3d11va.h
| | |-- defs.h
| | |-- dirac.h
| | |-- dv_profile.h
| | |-- dxva2.h
| | |-- jni.h
| | |-- mediacodec.h
| | |-- packet.h
| | |-- qsv.h
| | |-- vdpau.h
| | |-- version.h
| | |-- version_major.h
| | |-- videotoolbox.h
| | |-- vorbis_parser.h
| | `-- xvmc.h
| |-- libavdevice
| | |-- avdevice.h
| | |-- version.h
| | `-- version_major.h
| |-- libavfilter
| | |-- avfilter.h
| | |-- buffersink.h
| | |-- buffersrc.h
| | |-- version.h
| | `-- version_major.h
| |-- libavformat
| | |-- avformat.h
| | |-- avio.h
| | |-- version.h
| | `-- version_major.h
| |-- libavutil
| | |-- adler32.h
| | |-- aes.h
| | |-- aes_ctr.h
| | |-- ambient_viewing_environment.h
| | |-- attributes.h
| | |-- audio_fifo.h
| | |-- avassert.h
| | |-- avconfig.h
| | |-- avstring.h
| | |-- avutil.h
| | |-- base64.h
| | |-- blowfish.h
| | |-- bprint.h
| | |-- bswap.h
| | |-- buffer.h
| | |-- camellia.h
| | |-- cast5.h
| | |-- channel_layout.h
| | |-- common.h
| | |-- cpu.h
| | |-- crc.h
| | |-- csp.h
| | |-- des.h
| | |-- detection_bbox.h
| | |-- dict.h
| | |-- display.h
| | |-- dovi_meta.h
| | |-- downmix_info.h
| | |-- encryption_info.h
| | |-- error.h
| | |-- eval.h
| | |-- ffversion.h
| | |-- fifo.h
| | |-- file.h
| | |-- film_grain_params.h
| | |-- frame.h
| | |-- hash.h
| | |-- hdr_dynamic_metadata.h
| | |-- hdr_dynamic_vivid_metadata.h
| | |-- hmac.h
| | |-- hwcontext.h
| | |-- hwcontext_cuda.h
| | |-- hwcontext_d3d11va.h
| | |-- hwcontext_drm.h
| | |-- hwcontext_dxva2.h
| | |-- hwcontext_mediacodec.h
| | |-- hwcontext_opencl.h
| | |-- hwcontext_qsv.h
| | |-- hwcontext_vaapi.h
| | |-- hwcontext_vdpau.h
| | |-- hwcontext_videotoolbox.h
| | |-- hwcontext_vulkan.h
| | |-- imgutils.h
| | |-- intfloat.h
| | |-- intreadwrite.h
| | |-- lfg.h
| | |-- log.h
| | |-- lzo.h
| | |-- macros.h
| | |-- mastering_display_metadata.h
| | |-- mathematics.h
| | |-- md5.h
| | |-- mem.h
| | |-- motion_vector.h
| | |-- murmur3.h
| | |-- opt.h
| | |-- parseutils.h
| | |-- pixdesc.h
| | |-- pixelutils.h
| | |-- pixfmt.h
| | |-- random_seed.h
| | |-- rational.h
| | |-- rc4.h
| | |-- replaygain.h
| | |-- ripemd.h
| | |-- samplefmt.h
| | |-- sha.h
| | |-- sha512.h
| | |-- spherical.h
| | |-- stereo3d.h
| | |-- tea.h
| | |-- threadmessage.h
| | |-- time.h
| | |-- timecode.h
| | |-- timestamp.h
| | |-- tree.h
| | |-- twofish.h
| | |-- tx.h
| | |-- uuid.h
| | |-- version.h
| | |-- video_enc_params.h
| | `-- xtea.h
| |-- libswresample
| | |-- swresample.h
| | |-- version.h
| | `-- version_major.h
| `-- libswscale
| |-- swscale.h
| |-- version.h
| `-- version_major.h
|-- lib
| |-- libavcodec.a
| |-- libavdevice.a
| |-- libavfilter.a
| |-- libavformat.a
| |-- libavutil.a
| |-- libswresample.a
| |-- libswscale.a
| `-- pkgconfig
| |-- libavcodec.pc
| |-- libavdevice.pc
| |-- libavfilter.pc
| |-- libavformat.pc
| |-- libavutil.pc
| |-- libswresample.pc
| `-- libswscale.pc
`-- share
|-- doc
| `-- ffmpeg
| |-- bootstrap.min.css
| |-- default.css
| |-- developer.html
| |-- faq.html
| |-- fate.html
| |-- ffmpeg-all.html
| |-- ffmpeg-bitstream-filters.html
| |-- ffmpeg-codecs.html
| |-- ffmpeg-devices.html
| |-- ffmpeg-filters.html
| |-- ffmpeg-formats.html
| |-- ffmpeg-protocols.html
| |-- ffmpeg-resampler.html
| |-- ffmpeg-scaler.html
| |-- ffmpeg-utils.html
| |-- ffmpeg.html
| |-- ffprobe-all.html
| |-- ffprobe.html
| |-- general.html
| |-- git-howto.html
| |-- libavcodec.html
| |-- libavdevice.html
| |-- libavfilter.html
| |-- libavformat.html
| |-- libavutil.html
| |-- libswresample.html
| |-- libswscale.html
| |-- mailing-list-faq.html
| |-- nut.html
| |-- platform.html
| `-- style.min.css
|-- ffmpeg
| |-- examples
| | |-- Makefile
| | |-- README
| | |-- avio_list_dir.c
| | |-- avio_reading.c
| | |-- decode_audio.c
| | |-- decode_video.c
| | |-- demuxing_decoding.c
| | |-- encode_audio.c
| | |-- encode_video.c
| | |-- extract_mvs.c
| | |-- filter_audio.c
| | |-- filtering_audio.c
| | |-- filtering_video.c
| | |-- http_multiclient.c
| | |-- hw_decode.c
| | |-- metadata.c
| | |-- muxing.c
| | |-- qsv_transcode.c
| | |-- qsvdec.c
| | |-- remuxing.c
| | |-- resampling_audio.c
| | |-- scaling_video.c
| | |-- transcode_aac.c
| | |-- transcoding.c
| | |-- vaapi_encode.c
| | `-- vaapi_transcode.c
| |-- ffprobe.xsd
| |-- libvpx-1080p.ffpreset
| |-- libvpx-1080p50_60.ffpreset
| |-- libvpx-360p.ffpreset
| |-- libvpx-720p.ffpreset
| `-- libvpx-720p50_60.ffpreset
`-- man
|-- man1
| |-- ffmpeg-all.1
| |-- ffmpeg-bitstream-filters.1
| |-- ffmpeg-codecs.1
| |-- ffmpeg-devices.1
| |-- ffmpeg-filters.1
| |-- ffmpeg-formats.1
| |-- ffmpeg-protocols.1
| |-- ffmpeg-resampler.1
| |-- ffmpeg-scaler.1
| |-- ffmpeg-utils.1
| |-- ffmpeg.1
| |-- ffprobe-all.1
| `-- ffprobe.1
`-- man3
|-- libavcodec.3
|-- libavdevice.3
|-- libavfilter.3
|-- libavformat.3
|-- libavutil.3
|-- libswresample.3
`-- libswscale.3


19 directories, 234 files
lhj@lhj:~/FFmpeg$

開發(fā)板上部署

將bin文件復(fù)制到windows下

cp /home/lhj/opt/ffmpeg/board/bin/* /mnt/d

將lib文件復(fù)制到windows下

cp /home/lhj/opt/ffmpeg/board/lib/* /mnt/d

再將上述lib文件*.a導(dǎo)入到開發(fā)板的/usr/lib目錄下

將ffmpeg和ffprobe導(dǎo)入到~目錄下

測試

chmod +x ffmpeg ffprobe

root@myd-jx8mma7:~# ./ffmpeg
ffmpeg version N-109734-g806ecace91 Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
configuration: --cross-prefix=aarch64-linux-gnu- --enable-cross-compile --target-os=linux --cc=aarch64-linux-gnu-gcc --arch=arm64 --prefix=/home/lhj/opt/ffmpeg/board --enable-ffmpeg --disable-armv5te --disable-armv6 --disable-armv6t2
libavutil 57. 44.100 / 57. 44.100
libavcodec 59. 60.100 / 59. 60.100
libavformat 59. 37.100 / 59. 37.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 56.100 / 8. 56.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'
root@myd-jx8mma7:~#

root@myd-jx8mma7:~# ./ffprobe
ffprobe version N-109734-g806ecace91 Copyright (c) 2007-2023 the FFmpeg developers
built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
configuration: --cross-prefix=aarch64-linux-gnu- --enable-cross-compile --target-os=linux --cc=aarch64-linux-gnu-gcc --arch=arm64 --prefix=/home/lhj/opt/ffmpeg/board --enable-ffmpeg --disable-armv5te --disable-armv6 --disable-armv6t2
libavutil 57. 44.100 / 57. 44.100
libavcodec 59. 60.100 / 59. 60.100
libavformat 59. 37.100 / 59. 37.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 56.100 / 8. 56.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
Simple multimedia streams analyzer
usage: ffprobe [OPTIONS] INPUT_FILE

You have to specify one input file.
Use -h to get full help or, even better, run 'man ffprobe'.
root@myd-jx8mma7:~#

性能測試

https://www.sample-videos.com/index.php#sample-mp4-video下下載測試視頻改名為test.mp4

導(dǎo)入到開發(fā)板。

./ffmpeg -benchmark -i test.mp4 -f null -

打印如下

root@myd-jx8mma7:~# ffmpeg -benchmark -i test.mp4 -f null -
-sh: ffmpeg: command not found
root@myd-jx8mma7:~# ./ffmpeg -benchmark -i test.mp4 -f null -
ffmpeg version N-109734-g806ecace91 Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
configuration: --cross-prefix=aarch64-linux-gnu- --enable-cross-compile --target-os=linux --cc=aarch64-linux-gnu-gcc --arch=arm64 --prefix=/home/lhj/opt/ffmpeg/board --enable-ffmpeg --disable-armv5te --disable-armv6 --disable-armv6t2
libavutil 57. 44.100 / 57. 44.100
libavcodec 59. 60.100 / 59. 60.100
libavformat 59. 37.100 / 59. 37.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 56.100 / 8. 56.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01T0000.000000Z
encoder : Lavf53.24.2
Duration: 0050.86, start: 0.000000, bitrate: 1474 kb/s
Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 1086 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
Metadata:
creation_time : 1970-01-01T0000.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
Metadata:
creation_time : 1970-01-01T0000.000000Z
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
Stream #0:1 -> #0:1 (aac (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, null, to 'pipe:':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf59.37.100
Stream #0 Video: wrapped_avframe, yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn (default)
Metadata:
creation_time : 1970-01-01T0000.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
encoder : Lavc59.60.100 wrapped_avframe
Stream #0 Audio: pcm_s16le, 48000 Hz, 5.1, s16, 4608 kb/s (default)
Metadata:
creation_time : 1970-01-01T0000.000000Z
handler_name : SoundHandler
vendor_id : [0][0][0][0]
encoder : Lavc59.60.100 pcm_s16le
frame= 4271 fps=222 q=-0.0 Lsize=N/A time=0050.83 bitrate=N/A speed=8.87x
video:2002kB audio:96108kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
bench: utime=67.061s stime=2.796s rtime=19.272s
bench: maxrss=40720kB
root@myd-jx8mma7:~#

對比在PC上的測試結(jié)果

bench: utime=8.169s

bench: maxrss=107384kB

開板上大概是PC上2.5分之一的效率。這相對對于2th Gen Intel(R) Core(TM) i5-12500H 2.50 GHz處理器切實固態(tài)硬盤的電腦來說，嵌入式開發(fā)板的性能已經(jīng)算不錯了，單純針對這一點幾乎可以媲美PC使用了。

03.

網(wǎng)絡(luò)視頻點播終端

./ffmpeg -re -i test.mp4 -an -vcodec copy -f rtp rtp://192.168.2.100:5004

打印如下

root@myd-jx8mma7:~# ./ffmpeg -re -i test.mp4 -an -vcodec copy -f rtp rtp://192.168.2.100:5004
ffmpeg version N-109734-g806ecace91 Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
configuration: --cross-prefix=aarch64-linux-gnu- --enable-cross-compile --target-os=linux --cc=aarch64-linux-gnu-gcc --arch=arm64 --prefix=/home/lhj/opt/ffmpeg/board --enable-ffmpeg --disable-armv5te --disable-armv6 --disable-armv6t2
libavutil 57. 44.100 / 57. 44.100
libavcodec 59. 60.100 / 59. 60.100
libavformat 59. 37.100 / 59. 37.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 56.100 / 8. 56.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01T0000.000000Z
encoder : Lavf53.24.2
Duration: 0050.86, start: 0.000000, bitrate: 1474 kb/s
Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 1086 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
Metadata:
creation_time : 1970-01-01T0000.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
Metadata:
creation_time : 1970-01-01T0000.000000Z
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Output #0, rtp, to 'rtp://192.168.2.100:5004':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf59.37.100
Stream #0 Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 1086 kb/s, 25 fps, 25 tbr, 90k tbn (default)
Metadata:
creation_time : 1970-01-01T0000.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 192.168.2.100
t=0 0
a=tool:libavformat 59.37.100
m=video 5004 RTP/AVP 96
b=AS:1086
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z01AH9oBQBbsBEAAAAMAQAAADIPGDKg=,aO88gA==; profile-level-id=4D401F

Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame= 683 fps= 25 q=-1.0 size= 3102kB time=0027.28 bitrate= 931.5kbits/s speed= 1x

復(fù)制如下部分：

在PC端新建demo.sdp文件,粘體上述內(nèi)容，然后使用VLC打開該sdp文件(VLC的安裝網(wǎng)上搜索即可)。

04.

總結(jié)

本文進(jìn)行了ffmpeg開發(fā)環(huán)境的搭建，并在開發(fā)板上測試了ffmpeg的解碼性能，以及實現(xiàn)了網(wǎng)絡(luò)視頻播放的Demo。綜上可以看出開發(fā)板的多媒體性能是非常不錯的，完全滿足多媒體終端的應(yīng)用場景。