k
/
FFmpegAndroid
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

update doc

Browse Source
pull/209/head
xufulong 3 years ago
parent db88223c62
commit de77f007cf
2 changed files with 78 additions and 86 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 3
      README.md
  2. 161
      doc/FFmpeg_command_line.md

3
README.md
Unescape View File

@ -49,6 +49,3 @@ When it finishes probing, the result of metadata will display on screen.<br>
### Preview thumbnail when seeking: ### Preview thumbnail when seeking:
![preview](https://github.com/xufuji456/FFmpegAndroid/blob/master/gif/preview.gif) ![preview](https://github.com/xufuji456/FFmpegAndroid/blob/master/gif/preview.gif)
***
<br><br>

161
doc/FFmpeg_command_line.md
Unescape View File

@ -7,71 +7,70 @@ ffprobe用于检测多媒体流格式；ffplay用于播放视频,包括本地与
# 一、ffmpeg命令行 # 一、ffmpeg命令行
## 1、命令行参数介绍 ## 1、命令行参数介绍
Print help / information / capabilities:<br> Print help / information / capabilities:<br>
--help topic show help<br> --help topic |show help<br>
-version show version<br> -version |show version<br>
-formats show available formats<br> -formats |show available formats<br>
-muxers show available muxers<br> -muxers |show available muxers<br>
-demuxers show available demuxers<br> -demuxers |show available demuxers<br>
-devices show available devices<br> -devices |show available devices<br>
-codecs show available codecs<br> -codecs |show available codecs<br>
-decoders show available decoders<br> -decoders |show available decoders<br>
-encoders show available encoders<br> -encoders |show available encoders<br>
-bsfs show available bit stream filters<br> -bsfs |show available bit stream filters<br>
-protocols show available protocols<br> -protocols |show available protocols<br>
-filters show available filters<br> -filters |show available filters<br>
-pix_fmts show available pixel formats<br> -pix_fmts |show available pixel formats<br>
-sample_fmts show available audio sample formats<br> -sample_fmts |show available audio sample formats<br>
-hwaccels show available HW acceleration methods<br> -hwaccels |show available HW acceleration methods<br>
Global options (affect whole program instead of just one file:<br> Global options (affect whole program instead of just one file:<br>
-v loglevel set logging level<br> -v loglevel |set logging level<br>
-y overwrite output files<br> -y |overwrite output files<br>
-n never overwrite output files<br> -n |never overwrite output files<br>
-filter_threads number of non-complex filter threads<br> -filter_threads |number of non-complex filter threads<br>
-stats print progress report during encoding<br> -stats |print progress report during encoding<br>
-vol volume change audio volume (256=normal)<br> -vol volume |change audio volume (256=normal)<br>
Per-file main options:<br> Per-file main options:<br>
-f fmt force format<br> -f fmt |force format<br>
-c codec codec name<br> -c codec |codec name<br>
-codec codec codec name<br> -codec codec |codec name<br>
-t duration record or transcode "duration" seconds of audio/video<br> -t duration |record or transcode "duration" seconds of audio/video<br>
-to time_stop record or transcode stop time<br> -to time_stop |record or transcode stop time<br>
-fs limit_size set the limit file size in bytes<br> -fs limit_size |set the limit file size in bytes<br>
-ss time_off set the start time offset<br> -ss time_off |set the start time offset<br>
-sseof time_off set the start time offset relative to EOF<br> -sseof time_off |set the start time offset relative to EOF<br>
-frames number set the number of frames to output<br> -frames number |set the number of frames to output<br>
-filter filter_graph set stream filtergraph<br> -filter filter_graph set stream filtergraph<br>
-discard discard<br> -discard |discard<br>
-disposition disposition<br> -disposition |disposition<br>
Video options:<br> Video options:<br>
-vframes number set the number of video frames to output<br> -vframes number |set the number of video frames to output<br>
-r rate set frame rate (Hz value, fraction or abbreviation)<br> -r rate |set frame rate (Hz value, fraction or abbreviation)<br>
-s size set frame size (WxH or abbreviation)<br> -s size |set frame size (WxH or abbreviation)<br>
-aspect aspect set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)<br> -aspect aspect |set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)<br>
-bits_per_raw_sample number set the number of bits per raw sample<br> -vn |disable video<br>
-vn disable video<br> -vcodec codec |force video codec ('copy' to copy stream)<br>
-vcodec codec force video codec ('copy' to copy stream)<br> -timecode hh:mm:ss |set initial TimeCode value.<br>
-timecode hh:mm:ss[:;.]ff set initial TimeCode value.<br> -vf filter_graph |set video filters<br>
-vf filter_graph set video filters<br> -ab bitrate |audio bitrate (please use -b:a)<br>
-ab bitrate audio bitrate (please use -b:a)<br> -b bitrate |video bitrate (please use -b:v)<br>
-b bitrate video bitrate (please use -b:v)<br>
Audio options:<br> Audio options:<br>
-aframes number set the number of audio frames to output<br> -aframes number |set the number of audio frames to output<br>
-aq quality set audio quality (codec-specific)<br> -aq quality |set audio quality (codec-specific)<br>
-ar rate set audio sampling rate (in Hz)<br> -ar rate |set audio sampling rate (in Hz)<br>
-ac channels set number of audio channels<br> -ac channels |set number of audio channels<br>
-an disable audio<br> -an |disable audio<br>
-acodec codec force audio codec ('copy' to copy stream)<br> -acodec codec |force audio codec ('copy' to copy stream)<br>
-vol volume change audio volume (256=normal)<br> -vol volume |change audio volume (256=normal)<br>
-af filter_graph set audio filters<br> -af filter_graph |set audio filters<br>
Subtitle options:<br> Subtitle options:<br>
-s size set frame size<br> -s size |set frame size<br>
-sn disable subtitle<br> -sn |disable subtitle<br>
-scodec codec force subtitle codec ('copy' to copy stream)<br> -scodec codec |force subtitle codec ('copy' to copy stream)<br>
命令行整体格式：以ffmpeg开头，参数之间用空格隔开，每个参数key以"-"开头，后面跟着参数value，输出文件放在命令行最后。<br> 命令行整体格式：以ffmpeg开头，参数之间用空格隔开，每个参数key以"-"开头，后面跟着参数value，输出文件放在命令行最后。<br>
@ -139,29 +138,29 @@ ffmpeg -ss 10 -i input.mp4 -f image2 -vframes 1 -an screenshot.jpg<br>
ffmpeg -i input.mp4 -i logo.png -filter_complex overlay=10:20 pic_watermark.mp4<br> ffmpeg -i input.mp4 -i logo.png -filter_complex overlay=10:20 pic_watermark.mp4<br>
如果要灵活设置左上角、右上角、左下角、右下角位置，可以使用case语句，其中main_w代表视频宽度，<br> 如果要灵活设置左上角、右上角、左下角、右下角位置，可以使用case语句，其中main_w代表视频宽度，<br>
main_h代表视频高度，overlay_w代表水印宽度，overlay_h代表水印高度：<br> main_h代表视频高度，overlay_w代表水印宽度，overlay_h代表水印高度：<br>
```
public static String obtainOverlay(int offsetX, int offsetY, int location) {<br> public static String obtainOverlay(int offsetX, int offsetY, int location) {
switch (location) {<br> switch (location) {
case 2:<br> case 2:
return "overlay='(main_w-overlay_w)-" + offsetX + ":" + offsetY + "'";<br> return "overlay='(main_w-overlay_w)-" + offsetX + ":" + offsetY + "'";
case 3:<br> case 3:
return "overlay='" + offsetX + ":(main_h-overlay_h)-" + offsetY + "'";<br> return "overlay='" + offsetX + ":(main_h-overlay_h)-" + offsetY + "'";
case 4:<br> case 4:
return "overlay='(main_w-overlay_w)-" + offsetX + ":(main_h-overlay_h)-" + offsetY + "'";<br> return "overlay='(main_w-overlay_w)-" + offsetX + ":(main_h-overlay_h)-" + offsetY + "'";
case 1:<br> case 1:
default:<br> default:
return "overlay=" + offsetX + ":" + offsetY;<br> return "overlay=" + offsetX + ":" + offsetY;
}<br> }
}<br> }
public static String[] addWaterMarkImg(String inputPath, String imgPath, int location,<br> public static String[] addWaterMarkImg(String inputPath, String imgPath, int location,
int offsetXY, String outputPath) {<br> int offsetXY, String outputPath) {
String overlay = obtainOverlay(offsetXY, offsetXY, location);<br> String overlay = obtainOverlay(offsetXY, offsetXY, location);
String waterMarkCmd = "ffmpeg -i %s -i %s -filter_complex %s -preset:v superfast %s";<br> String waterMarkCmd = "ffmpeg -i %s -i %s -filter_complex %s -preset:v superfast %s";
waterMarkCmd = String.format(waterMarkCmd, inputPath, imgPath, overlay, outputPath);<br> waterMarkCmd = String.format(waterMarkCmd, inputPath, imgPath, overlay, outputPath);
return waterMarkCmd.split(" ");<br> return waterMarkCmd.split(" ");
}<br> }
```
### 3.5 GIF水印 ### 3.5 GIF水印
使用-ignore_loop 0代表GIF循环显示，其他操作与图片水印一致：<br> 使用-ignore_loop 0代表GIF循环显示，其他操作与图片水印一致：<br>
ffmpeg -i input.mp4 -ignore_loop 0 -i logo.gif -filter_complex overlay=10:20 gif_mark.mp4<br> ffmpeg -i input.mp4 -ignore_loop 0 -i logo.gif -filter_complex overlay=10:20 gif_mark.mp4<br>
@ -189,12 +188,8 @@ ffmpeg -ss 20 -accurate_seek -t 10 -i input.mp4 -an -r 5 %3d.jpg<br>
使用setpts设置视频速度，atempo设置音频速度：<br> 使用setpts设置视频速度，atempo设置音频速度：<br>
ffmpeg -i in.mp4 -filter_complex [0:v]setpts=%.2f*PTS[v];[0:a]atempo=%.2f[a] -map [v] -map [a] out.mp4<br> ffmpeg -i in.mp4 -filter_complex [0:v]setpts=%.2f*PTS[v];[0:a]atempo=%.2f[a] -map [v] -map [a] out.mp4<br>
### 3.12 插入封面 ### 3.12 旋转视频
其中-disposition:v:1 attached_pic代表封面：<br> ffmpeg -i in.mp4 -c copy -metadata:s:\v:0 rotate=90 out.mp4<br>
ffmpeg -i in.mp4 -i photo.png -map 0 -map 1 -c copy -c:v:1 png -disposition:v:1 attached_pic out.mp4<br>
### 3.13 旋转视频
ffmpeg -i in.mp4 -c copy -metadata:s:v:0 rotate=90 out.mp4<br>
# 二、ffplay命令行 # 二、ffplay命令行
ffplay主要用于播放视频，也可以播放网络流，示例如下：<br> ffplay主要用于播放视频，也可以播放网络流，示例如下：<br>

Write Preview
Loading…
Cancel
Save