Multimedia handling with a fast audio and video encoder

1 FFmpeg Basics Multimedia handling with a fast audio and video encoder Frantisek Korbel Links Book homepage: Facebook: Twitter: YouTube: Brief Contents Introduction 12. 1. FFmpeg Fundamentals 15. 2. Displaying Help and Features 29. 3. Bit Rate, Frame Rate and File Size 60. 4. Resizing and Scaling video 64. 5. Cropping video 69. 6. Padding video 73. 7. Flipping and Rotating video 77. 8. Blur, Sharpen and Other Denoising 81. 9. Overlay - Picture in Picture 87. 10. Adding Text on video 93. 11. Conversion Between Formats 99. 12. Time Operations 108. 13. Mathematical Functions 113. 14. Metadata and Subtitles 117. 15. Image Processing 122. 16. Digital audio 128. 17. Presets for Codecs 138. 18. Interlaced video 142. 19. FFmpeg Components and Projects 147.

2 20. Microphone and Webcam 154. 21. Batch Files 159. 22. Color Corrections 164. 23. Advanced Techniques 179. 24. video on Web 193. 25. Debugging and Tests 200. Glossary 207. About the author 216. Table of Contents Introduction ..12. First Dedicated Conventions ..13. Your feedback is important ..14. 1. FFmpeg Fundamentals ..15. FFmpeg Developers of Participation in FFmpeg development ..16. FFmpeg download ..17. Command line syntax ..17. Windows Command Prompt and its Path setting ..19. Renaming to shortened form ..20. Displaying output preview ..21. Preview with FFplay media player ..21. Preview with SDL output device ..21. SI prefixes available in FFmpeg ..21. Transcoding with ffmpeg ..22. Filters, filterchains and filtergraphs.

3 23. Selection of media Lavfi virtual device ..27. Color 2. Displaying Help and Features ..29. Text help in FFmpeg Available bitstream Available codecs ..30. Available decoders ..36. Available encoders ..43. Available filters ..46. Available Available layouts of audio channels ..52. FFmpeg Available pixel Available protocols ..57. Available audio sample formats ..58. FFmpeg Using MORE command for output formatting ..59. Redirecting output to file ..59. 3. Bit Rate, Frame Rate and File Size ..60. Frame (frequency) rate introduction ..60. Frame rate Using -r option ..61. Using fps Predefined values for frame Bit (data) rate Table of Contents Setting bit rate ..62. Constant bit rate (CBR) setting ..62. Setting maximum size of output file.

4 63. File size calculation ..63. 4. Resizing and Scaling Resizing video ..64. Predefined video frame Considerations when resizing - Nyquist sampling theorem ..66. Special enlarging Advanced Scaling video proportionately to Scaling to predefined width or height ..68. 5. Cropping video ..69. Cropping Cropping frame center ..70. Automatic detection of cropping Cropping of timer ..71. 6. Padding Padding basics ..73. Padding videos from 4:3 to 16:9 ..75. Padding videos from 16:9 to 4:3 ..75. Padding from and to various aspect ratios ..76. Pillarboxing - adding boxes horizontally ..76. Letterboxing - adding boxes 7. Flipping and Rotating video ..77. Horizontal flip ..77. Vertical flip ..77. Introduction to Rotation by 90 degrees counterclockwise and flip vertically.

5 79. Rotation by 90 degrees clockwise ..79. Rotation by 90 degrees counterclockwise ..80. Rotation by 90 degrees clockwise and flip vertically ..80. 8. Blur, Sharpen and Other Denoising ..81. Blur video effect ..81. Sharpen video ..83. Noise reduction with denoise3d ..84. Noise reduction with hqdn3d ..85. Noise reduction with nr option ..86. 9. Overlay - Picture in Introduction to Command structure for overlay ..87. Logo in one of corners ..88. Logo in top-left corner ..89. Logo in top-right corner ..89. Logo in bottom-right corner ..89. 4. Table of Contents Logo in bottom-left corner ..90. Logo shows in specified moment ..90. video with timer ..91. Other overlay 10. Adding Text on video ..93. Introduction to adding text on Text Horizontal location setting.

6 95. Vertical location setting ..95. Font size and color Dynamic Horizontal text Vertical text movement ..98. 11. Conversion Between Introduction to media formats ..99. File formats ..99. Media containers ..99. Transcoding and Introduction to codecs ..100. Overwriting same named output Generic options for Private options for MPEG-1 video MPEG-2 video MPEG-4 video libvpx video encoder ..106. AC-3 audio encoder ..107. Simplified encoding of VCD, SVCD, DVD, DV and DV50 ..107. 12. Time Operations ..108. Duration of audio and video ..108. Setting with -t Setting with number of frames ..108. Setting delay from Extracting specific part from media Delay between input streams ..109. One input Two or more input Limit for processing time.

7 109. Shortest stream determines encoding Timestamp and time encoder timebase setting ..110. audio and video speed video speed audio speed change ..112. Synchronizing audio data with timestamps ..112. 13. Mathematical Functions ..113. 5. Table of Contents Expressions that can use mathematical Built-in arithmetic operators ..114. Built-in constants ..114. Table of built-in mathematical Examples of using 14. Metadata and Subtitles ..117. Introduction to metadata ..117. Creating metadata ..117. Saving and loading metadata to/from the file ..119. Deletion of metadata ..119. Introduction to subtitles ..119. Subtitles encoded directly to video ..121. 15. Image Processing ..122. Supported image formats ..122. Creating Screenshots from Animated GIFs from videos.

8 123. Images from FFmpeg video video conversion to images ..124. Resizing, cropping and padding Flipping, rotating and overlaying images ..126. Conversion between image Creating video from images ..127. video from one image ..127. video from many images ..127. 16. Digital Introduction to digital audio ..128. audio quantization and audio file formats ..130. Sound synthesis ..130. Stereo and more complex sounds ..132. Binaural tones for stress reduction ..132. Sound volume settings ..133. Multiple sounds mixed to one output ..133. Downmixing stereo to mono, surround to stereo ..134. Simple audio Adjusting audio for listening with audio modifications with -map_channel option ..136. Switching audio channels in stereo input.

9 137. Splitting stereo sound to 2 separate Muting one channel from stereo input ..137. Merging 2 audio streams to 1 multichannel stream ..137. audio stream forwarding with buffer order control ..137. 17. Presets for Codecs ..138. Introduction to preset files ..138. Examples of preset files ..139. 6. Table of Contents Preset file Preset file Preset file Preset file Preset file 18. Interlaced NTSC, PAL and SECAM TV standards ..142. Interlaced frame type Field order change of interlaced video ..143. Deinterlacing ..144. yadif Option Deinterlacing filters from MPlayer project ..144. Pullup Interlaced video and digital television ..145. 19. FFmpeg Components and Projects ..147. FFplay Key and mouse controls during playback ..148.

10 FFplay show FFprobe introduction ..149. FFserver introduction ..150. FFmpeg software libraries ..150. libavcodec ..150. libavdevice ..150. libavfilter ..151. libavformat ..151. libavutil ..151. libswscale ..151. Projects using FFmpeg HTML5 support in Google Videoprocessing on YouTube and Facebook ..152. Multimedia frameworks utilizing FFmpeg ..152. video editors ..152. audio Media players using FFmpeg ..153. 20. Microphone and Introduction to input List of available cameras and microphones ..154. Available options for webcam ..155. Displaying and recording webcam input ..156. Using two Recording sound and sending it to 21. Batch Files ..159. Advantages of batch 7. Table of Contents Batch file Typical usage of batch files.