Use FFMPEG to convert video files to FLV <Article 6>

1. First download FFMPEG

2. decompress the decompressed ffmpeg.exe and pthreadgc2.dll files to any directory (of course, it can also be a directory in webroot)

3. Create the BAT file convertvideo. BAT and add the following content: (for parameter descriptions, see Appendix 1)

 

[TXT]View plaincopy

1. % 1/FFMPEG-I % 2-y-AB 56-ar 22050-B 500-R 15-s 320 * 240% 3
2. Exit

 

******************

% 1 is the FFMPEG storage directory

% 2 is the file path to be converted

% 3 is the output directory of the FLV file.

******************

Note that the path of the BAT file cannot contain spaces.

 

 

[Capture the thumbnail while converting the file format]
FFmpeg-I "test. Avi"-y-F image2-SS 8-T 0.001-s 350x240 "test.jpg"

[Capture existing FLV images]
FFmpeg-I "test. FLV"-y-F image2-SS 8-T 0.001-s 350x240 "test.jpg"
****************
-SS followed by time in seconds
****************

[TXT]View plaincopy

1. [Capture the thumbnail while converting the file format]
2. FFmpeg-I "test. Avi"-y-F image2-SS 8-T 0.001-s 350x240 "test.jpg"
4. [Capture existing FLV images]
5. FFmpeg-I "test. FLV "-y-F image2-SS 8-T 0.001-s 350x240" test.jpg "<br> ****************
6. -SS followed by time in seconds
7. ****************

 

4. Create a class

 

[Java]View plaincopy

1. Public class convertvideo
2. {
3. Private Static string input_path;
4. Private Static string output_path;
5. Private Static string project_path;
6. Private Static hashmap <string, string> filetype;
8. Static
9. {
10. Filetype = new hashmap <string, string> ();
11. Filetype. Put ("Avi", "true ");
12. Filetype. Put ("MPG", "true ");
13. Filetype. Put ("WMV", "true ");
14. Filetype. Put ("3GP", "true ");
15. Filetype. Put ("mov", "true ");
16. Filetype. Put ("MP4", "true ");
17. Filetype. Put ("ASF", "true ");
18. Filetype. Put ("ASX", "true ");
19. Filetype. Put ("FLV", "true ");
20. }
22. Public static void converttoflv (string projectpath, string inputfile, string outputfile)
23. {
24. Input_path = inputfile;
25. Output_path = outputfile;
26. Project_path = projectpath;
27. If (checkcontenttype ())
28. Processflv (); // directly convert the file into a FLV File
29. }
31. Private Static Boolean checkcontenttype ()
32. {
33. String type = input_path.substring (input_path.lastindexof (".") + 1, input_path.length (). tolowercase ();
34. // Formats that can be parsed by FFMPEG: (ASX, ASF, mpg, WMV, 3GP, MP4, mov, Avi, and FLV)
35. Return "true". Equals (filetype. Get (type ));
36. }
38. Private Static void processflv ()
39. {
40. If (new file (input_path). isfile ())
41. {
42. Try
43. {
44. String cmd = "CMD/C start X: // FFMPEG. BAT/"" + project_path + "/"/"" + input_path + "/"/"" + output_path + "/"";
45. Runtime.getruntime(cmd.exe C (CMD );
46. }
47. Catch (exception E)
48. {
49. E. printstacktrace ();
50. }
51. }
52. }
53. }

 

 

5. Test code

[Java]View plaincopy

1. Public static void main (string [] ARGs)
2. {
3. Convertvideo. converttoflv ("X: // convertvideo", "X: // A. wmv", "X: // A. FLV ");
4. }

 

 

JS Code
[JavaScript]View plaincopy

1. Varswf_width = "100% ";
2. VaR swf_height = "100% ";
3. VaR files = 'nba. flv ';
4. VaR Config = '0: automatic playback | 1: continuous playback | 100: Default volume | 0: control bar position | 2: control bar display | 0x000033: subject color | 60: subject transparency | 0x66ff00: Halo color | 0 xffffff: icon color | 0 xffffff: text color |: logo text |: logo address |: End SWF address ';
5. VaR texts = 'nba highlights top 10 ';
6. Document. write ('<object classid = "CLSID: d27cdb6e-ae6d-11cf-96b8-444553540000" codebase = "http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" width = "' + swf_width + '" Height = "' + swf_height + '"> ');
7. Document. Write ('<Param name = "movie" value = "vcastr2.swf"/> ');
8. Document. Write ('<Param name = "quality" value = "high"/> ');
9. Document. Write ('<Param name = "menu" value = "false"/> ');
10. Document. Write ('<Param name = wmode value = "Opaque"/> ');
11. Document. write ('<Param name = "flashvars" value = "vcastr_file =' + files + '& vcastr_title =' + texts + '& vcastr_config =' + config + '"> ');
12. Document. write ('<embed src = "vcastr2.swf" mce_src = "vcastr2.swf"/> "wmode =" Opaque "flashvars =" vcastr_file =' + files + '& vcastr_title =' + texts + '& vcastr_config =' + config + '"menu =" false "Quality =" high "width ="' + swf_width + '"Height ="' + swf_height + '"type = "Application/X-Shockwave-flash" pluginspage = "http://www.macromedia.com/go/getflashplayer"/> ');
13. Document. Write ('</Object> ');

[Note] If you encounter video formats other than those involved in FFMPEG, you can use other conversion tools to convert them first, such as mencoder.

Appendix 1 (FFMPEG parameter description ):

[Parameters]	[Description]	[Example]
-I "path"	Specify the file path to be converted	-I "C:/NBA. wmv"
-Y	Overwrite the output file, that is, if the NBA. xxx file already exists, directly overwrite it
Control screen parameters
-Bitexac	Use standard Bit Rate
-Vcodec Xvid	Use Xvid for compression
-S <aspect ratio>	Resolution size	-S 320*240
-R <value>	Frame Rate (non-standard values will cause audio and video to be not synchronized [standard value: 15 or 29.97 ])	-R 15
-B <bit rate>	Specify the compression Bit Rate	-B 1500
-Qmin <value>	Set minimum quality	-Qmin 10
-Qmax <value>	Opposite to-qmin, it can be used together with-qmin	-Qmax 30
-Sameq	Use the same quality as the source video
Control sound Parameters
-Acodec AAC	Set sound Encoding
-AC <value>	Set the number of channels: 1 for single channel, 2 for stereo	-AC 2
-Ar <sampling rate>	Set the sound sampling rate (22050)	-Ar 22050
-AB <bit rate>	Set the sound bit rate (-ac must be set to half the bit rate when set to stereo, for example, 96 for Kbps)	-AB 96
-Vol <percentage>	Set the volume. For example, set 200 to 2 times the original volume.	-Vol 200

Blog Source: http://www.javaeye.com/topic/333994

Use FFMPEG to convert video files to FLV <Article 6>