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Revisions

  1. acceptableEngineering revised this gist May 5, 2023. 1 changed file with 9 additions and 0 deletions.
    9 changes: 9 additions & 0 deletions Video-Engineering-Tricks.md
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    Original file line number Diff line number Diff line change
    @@ -20,6 +20,15 @@ ffmpeg -i in.flv -vcodec copy out.mp4

    ---

    ### Analysis

    Generating a waveform from a file with audio:
    ```
    ffmpeg -i in.mp3 -filter_complex "showwavespic=s=1280x320" -frames:v 1 ./waveform.png
    ```

    ---

    ### Adjustments / Processing

    Boost audio level (volume) without re-encoding:
  2. acceptableEngineering revised this gist May 3, 2023. 1 changed file with 2 additions and 2 deletions.
    4 changes: 2 additions & 2 deletions Video-Engineering-Tricks.md
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    Original file line number Diff line number Diff line change
    @@ -61,7 +61,7 @@ ffmpeg -i FILE.mp4 -crf 30 -preset ultrafast -acodec aac -strict experimental -a

    Mount RTSP as virtual video device:
    ```
    $ ffmpeg -f mjpeg -i rtsp://192.168.1.16/play2.sdp -pix_fmt yuv420p -f v4l2 /dev/video0
    ffmpeg -f mjpeg -i rtsp://192.168.1.16/play2.sdp -pix_fmt yuv420p -f v4l2 /dev/video0
    ```
    [Source](https://superuser.com/a/1489325)

    @@ -72,7 +72,7 @@ $ ffmpeg -f mjpeg -i rtsp://192.168.1.16/play2.sdp -pix_fmt yuv420p -f v4l2 /dev
    ### Ripping YouTube Video:
    1. Enumerate format and resolution choices:
    ```
    $ youtube-dl --list-formats 'https://www.youtube.com/watch?v=C_YiECKlPuE'
    youtube-dl --list-formats 'https://www.youtube.com/watch?v=C_YiECKlPuE'
    ```
    Output:
    ```
  3. acceptableEngineering revised this gist May 3, 2023. 1 changed file with 5 additions and 3 deletions.
    8 changes: 5 additions & 3 deletions Video-Engineering-Tricks.md
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    Original file line number Diff line number Diff line change
    @@ -4,7 +4,7 @@ These are commands I use on a regular basis. For the sake of simplicity, the fil

    ---

    ## FFMPEG
    ## FFmpeg

    ### Media Conversion

    @@ -104,6 +104,8 @@ format code extension resolution note
    ```
    2. The choice with ID 96 "(best)" seems ideal, let's use that one and save it as an MP4:
    ```
    ffmpeg -i $(youtube-dl -f 96 -g 'https://www.youtube.com/watch?v=2nAHpvFXo9s') \
    ffmpeg -i $(youtube-dl -f 96 -g 'https://www.youtube.com/watch?v=C_YiECKlPuE') \
    -c:v copy -c:a aac -strict experimental output.mp4
    ```
    ```

    ---
  4. acceptableEngineering revised this gist May 3, 2023. 1 changed file with 46 additions and 1 deletion.
    47 changes: 46 additions & 1 deletion Video-Engineering-Tricks.md
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    Original file line number Diff line number Diff line change
    @@ -2,6 +2,8 @@

    These are commands I use on a regular basis. For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis.

    ---

    ## FFMPEG

    ### Media Conversion
    @@ -61,4 +63,47 @@ Mount RTSP as virtual video device:
    ```
    $ ffmpeg -f mjpeg -i rtsp://192.168.1.16/play2.sdp -pix_fmt yuv420p -f v4l2 /dev/video0
    ```
    [Source](https://superuser.com/a/1489325)
    [Source](https://superuser.com/a/1489325)

    ---

    ## youtube-dl CLI

    ### Ripping YouTube Video:
    1. Enumerate format and resolution choices:
    ```
    $ youtube-dl --list-formats 'https://www.youtube.com/watch?v=C_YiECKlPuE'
    ```
    Output:
    ```
    [youtube] 2nAHpvFXo9s: Downloading webpage
    [youtube] 2nAHpvFXo9s: Downloading m3u8 information
    [youtube] 2nAHpvFXo9s: Downloading MPD manifest
    [info] Available formats for 2nAHpvFXo9s:
    format code extension resolution note
    139 m4a audio only DASH audio 64k , m4a_dash container, mp4a.40.5 (22050Hz)
    140 m4a audio only DASH audio 144k , m4a_dash container, mp4a.40.2 (44100Hz)
    278 webm 256x144 DASH video 80k , webm_dash container, vp9, 30fps, video only
    242 webm 426x240 DASH video 139k , webm_dash container, vp9, 30fps, video only
    160 mp4 256x144 DASH video 192k , mp4_dash container, avc1.4d400c, 30fps, video only
    243 webm 640x360 DASH video 240k , webm_dash container, vp9, 30fps, video only
    244 webm 854x480 DASH video 415k , webm_dash container, vp9, 30fps, video only
    133 mp4 426x240 DASH video 419k , mp4_dash container, avc1.4d4015, 30fps, video only
    134 mp4 640x360 DASH video 772k , mp4_dash container, avc1.4d401e, 30fps, video only
    247 webm 1280x720 DASH video 774k , webm_dash container, vp9, 30fps, video only
    135 mp4 854x480 DASH video 1077k , mp4_dash container, avc1.4d401f, 30fps, video only
    248 webm 1920x1080 DASH video 1402k , webm_dash container, vp9, 30fps, video only
    136 mp4 1280x720 DASH video 2187k , mp4_dash container, avc1.4d401f, 30fps, video only
    137 mp4 1920x1080 DASH video 4199k , mp4_dash container, avc1.4d4028, 30fps, video only
    91 mp4 256x144 269k , avc1.4d400c, 30.0fps, mp4a.40.5
    92 mp4 426x240 507k , avc1.4d4015, 30.0fps, mp4a.40.5
    93 mp4 640x360 962k , avc1.4d401e, 30.0fps, mp4a.40.2
    94 mp4 854x480 1282k , avc1.4d401f, 30.0fps, mp4a.40.2
    95 mp4 1280x720 2447k , avc1.4d401f, 30.0fps, mp4a.40.2
    96 mp4 1920x1080 4561k , avc1.4d4028, 30.0fps, mp4a.40.2 (best)
    ```
    2. The choice with ID 96 "(best)" seems ideal, let's use that one and save it as an MP4:
    ```
    ffmpeg -i $(youtube-dl -f 96 -g 'https://www.youtube.com/watch?v=2nAHpvFXo9s') \
    -c:v copy -c:a aac -strict experimental output.mp4
    ```
  5. acceptableEngineering revised this gist May 3, 2023. 1 changed file with 16 additions and 23 deletions.
    39 changes: 16 additions & 23 deletions Video-Engineering-Tricks.md
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    ## Description
    # Description

    These are FFmpeg commands I use on a regular basis and rather than keeping them to myself I figured it'd be good to share!
    These are commands I use on a regular basis. For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis.

    For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis:
    ## FFMPEG

    ---

    ## Media Conversion
    ### Media Conversion

    ### High-Quality, Infinitely Looping GIF from MP4
    High-Quality, Infinitely Looping GIF from MP4:
    ```
    ffmpeg -i input.mp4 -vf "fps=12,scale=720:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 output.gif
    ```

    ### Convert FLV to MP4 without full re-encode
    Convert FLV to MP4 without full re-encode:
    ```
    ffmpeg -i in.flv -vcodec copy out.mp4
    ```

    ---

    ## Adjustments / Processing
    ### Adjustments / Processing

    ### Boost audio level (volume) without re-encoding
    Boost audio level (volume) without re-encoding:
    ```
    ffmpeg -i in.mp4 -vcodec copy -af "volume=10dB" out.mp4
    ```

    ---

    ### Delay audio
    Delay audio:
    ```
    ffmpeg -i "in.mp4" -itsoffset 0.3 -i "in.mp4" -map 0:v -map 1:a -vcodec copy -acodec copy "out.mp4"
    ```

    ---

    ## Ripping
    ### Ripping

    ### Rip and audio stream (I use this to rip SHOUTcast streams, specifically ours)
    Rip and audio stream (I use this to periodically rip our SHOUTcast stream for a "backup reel"):
    ```
    ffmpeg -y -i http://geostream.cdn.shoutdrive.com:80/sd-mp3 out.mp3
    ```

    ---

    ### Rip an M3U8 (video HLS)
    Rip an M3U8 (video HLS):
    ```
    ffmpeg -i "http://on-demand.cdn.shoutdrive.com/mixes/service/2018-April-22_Thee-O/play.m3u8" -c copy -bsf:a aac_adtstoasc out.mp4
    ```

    ---

    ## Output / Encoding / Streaming
    ### Encoding / Streaming

    ### Stream a local file to an RTMP server (Periscope specification)
    Stream a local file to an RTMP server (Periscope specification in this case):
    ```
    ffmpeg -i FILE.mp4 -crf 30 -preset ultrafast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 92k -vcodec libx264 -x264-params keyint=60:no-scenecut=1 -r 30 -b:v 3250k -s 1280x720 -f flv rtmp://ca.pscp.tv:80/x/STREAM_KEY_HERE;
    ```

    ---

    ### Translating / Muxing

    ## Translating / Muxing

    ### Mount RTSP as virtual video device
    Mount RTSP as virtual video device:
    ```
    $ ffmpeg -f mjpeg -i rtsp://192.168.1.16/play2.sdp -pix_fmt yuv420p -f v4l2 /dev/video0
    ```
  6. acceptableEngineering renamed this gist May 3, 2023. 1 changed file with 0 additions and 0 deletions.
    0 FFmpeg-Recipes.md → Video-Engineering-Tricks.md
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    File renamed without changes.
  7. acceptableEngineering revised this gist Jul 8, 2022. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion FFmpeg-Recipes.md
    View file
    Original file line number Diff line number Diff line change
    @@ -68,4 +68,4 @@ ffmpeg -i FILE.mp4 -crf 30 -preset ultrafast -acodec aac -strict experimental -a
    ```
    $ ffmpeg -f mjpeg -i rtsp://192.168.1.16/play2.sdp -pix_fmt yuv420p -f v4l2 /dev/video0
    ```
    [Source])https://superuser.com/a/1489325)
    [Source](https://superuser.com/a/1489325)
  8. acceptableEngineering revised this gist Jul 8, 2022. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion FFmpeg-Recipes.md
    View file
    Original file line number Diff line number Diff line change
    @@ -68,4 +68,4 @@ ffmpeg -i FILE.mp4 -crf 30 -preset ultrafast -acodec aac -strict experimental -a
    ```
    $ ffmpeg -f mjpeg -i rtsp://192.168.1.16/play2.sdp -pix_fmt yuv420p -f v4l2 /dev/video0
    ```
    (Source)[https://superuser.com/a/1489325]
    [Source])https://superuser.com/a/1489325)
  9. acceptableEngineering revised this gist Jul 8, 2022. 1 changed file with 10 additions and 15 deletions.
    25 changes: 10 additions & 15 deletions FFmpeg-Recipes.md
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    Original file line number Diff line number Diff line change
    @@ -4,20 +4,6 @@ These are FFmpeg commands I use on a regular basis and rather than keeping them

    For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis:

    ## Table of Contents
    - [Media Conversion](#media-conversion)
    * [Looping GIF from MP4](#looping-gif-from-mp4)
    * [Convert FLV to MP4 without full re-encode](#convert-flv-to-mp4-without-full-re-encode)
    - [Adjustments / Processing](#adjustments---processing)
    * [Boost audio level (volume) without re-encoding](#boost-audio-level--volume--without-re-encoding)
    * [Delay audio](#delay-audio)
    - [Ripping](#ripping)
    * [Rip and audio stream (I use this to rip SHOUTcast streams, specifically ours)](#rip-and-audio-stream--i-use-this-to-rip-shoutcast-streams--specifically-ours-)
    * [Rip an M3U8 (video HLS)](#rip-an-m3u8--video-hls-)
    - [Output / Encoding / Streaming](#output---encoding---streaming)
    * [Stream a local file to an RTMP server (Periscope specification)](#stream-a-local-file-to-an-rtmp-server--periscope-specification-)


    ---

    ## Media Conversion
    @@ -73,4 +59,13 @@ ffmpeg -i "http://on-demand.cdn.shoutdrive.com/mixes/service/2018-April-22_Thee-
    ffmpeg -i FILE.mp4 -crf 30 -preset ultrafast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 92k -vcodec libx264 -x264-params keyint=60:no-scenecut=1 -r 30 -b:v 3250k -s 1280x720 -f flv rtmp://ca.pscp.tv:80/x/STREAM_KEY_HERE;
    ```

    ---
    ---


    ## Translating / Muxing

    ### Mount RTSP as virtual video device
    ```
    $ ffmpeg -f mjpeg -i rtsp://192.168.1.16/play2.sdp -pix_fmt yuv420p -f v4l2 /dev/video0
    ```
    (Source)[https://superuser.com/a/1489325]
  10. acceptableEngineering revised this gist Jun 28, 2022. 1 changed file with 2 additions and 3 deletions.
    5 changes: 2 additions & 3 deletions FFmpeg-Recipes.md
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    @@ -22,10 +22,9 @@ For the sake of simplicity, the filenames I use in the examples below are `in.mp

    ## Media Conversion

    ### Looping GIF from MP4
    (The `scale` directive will resize it to be 1280px wide and maintain the relative matching height)
    ### High-Quality, Infinitely Looping GIF from MP4
    ```
    ffmpeg -i input.mp4 -vf "fps=10,scale=1280:-1" -loop 1 output.gif
    ffmpeg -i input.mp4 -vf "fps=12,scale=720:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 output.gif
    ```

    ### Convert FLV to MP4 without full re-encode
  11. acceptableEngineering revised this gist Apr 27, 2020. 1 changed file with 5 additions and 5 deletions.
    10 changes: 5 additions & 5 deletions FFmpeg-Recipes.md
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    @@ -20,7 +20,7 @@ For the sake of simplicity, the filenames I use in the examples below are `in.mp

    ---

    ## Media Conversion:
    ## Media Conversion

    ### Looping GIF from MP4
    (The `scale` directive will resize it to be 1280px wide and maintain the relative matching height)
    @@ -35,7 +35,7 @@ ffmpeg -i in.flv -vcodec copy out.mp4

    ---

    ## Adjustments / Processing:
    ## Adjustments / Processing

    ### Boost audio level (volume) without re-encoding
    ```
    @@ -51,7 +51,7 @@ ffmpeg -i "in.mp4" -itsoffset 0.3 -i "in.mp4" -map 0:v -map 1:a -vcodec copy -ac

    ---

    ## Ripping:
    ## Ripping

    ### Rip and audio stream (I use this to rip SHOUTcast streams, specifically ours)
    ```
    @@ -67,11 +67,11 @@ ffmpeg -i "http://on-demand.cdn.shoutdrive.com/mixes/service/2018-April-22_Thee-

    ---

    ## Output / Encoding / Streaming:
    ## Output / Encoding / Streaming

    ### Stream a local file to an RTMP server (Periscope specification)
    ```
    ffmpeg -i FILE.mp4 -crf 30 -preset ultrafast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 92k -vcodec libx264 -x264-params keyint=60:no-scenecut=1 -r 30 -b:v 3250k -s 1280x720 -f flv rtmp://ca.pscp.tv:80/x/STREAM_KEY_HERE;
    ```

    ---
    ---
  12. acceptableEngineering revised this gist Apr 27, 2020. 1 changed file with 4 additions and 4 deletions.
    8 changes: 4 additions & 4 deletions FFmpeg-Recipes.md
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    Original file line number Diff line number Diff line change
    @@ -5,16 +5,16 @@ These are FFmpeg commands I use on a regular basis and rather than keeping them
    For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis:

    ## Table of Contents
    - [Media Conversion:](#media-conversion-)
    - [Media Conversion](#media-conversion)
    * [Looping GIF from MP4](#looping-gif-from-mp4)
    * [Convert FLV to MP4 without full re-encode](#convert-flv-to-mp4-without-full-re-encode)
    - [Adjustments / Processing:](#adjustments---processing-)
    - [Adjustments / Processing](#adjustments---processing)
    * [Boost audio level (volume) without re-encoding](#boost-audio-level--volume--without-re-encoding)
    * [Delay audio](#delay-audio)
    - [Ripping:](#ripping-)
    - [Ripping](#ripping)
    * [Rip and audio stream (I use this to rip SHOUTcast streams, specifically ours)](#rip-and-audio-stream--i-use-this-to-rip-shoutcast-streams--specifically-ours-)
    * [Rip an M3U8 (video HLS)](#rip-an-m3u8--video-hls-)
    - [Output / Encoding / Streaming:](#output---encoding---streaming-)
    - [Output / Encoding / Streaming](#output---encoding---streaming)
    * [Stream a local file to an RTMP server (Periscope specification)](#stream-a-local-file-to-an-rtmp-server--periscope-specification-)


  13. acceptableEngineering revised this gist Apr 27, 2020. 1 changed file with 49 additions and 11 deletions.
    60 changes: 49 additions & 11 deletions FFmpeg-Recipes.md
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    ## Description

    These are FFmpeg commands I use on a regular basis and rather than keeping them to myself I figured it'd be good to share!

    For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis:

    ## Create high-quality looping GIF from video file
    ## Table of Contents
    - [Media Conversion:](#media-conversion-)
    * [Looping GIF from MP4](#looping-gif-from-mp4)
    * [Convert FLV to MP4 without full re-encode](#convert-flv-to-mp4-without-full-re-encode)
    - [Adjustments / Processing:](#adjustments---processing-)
    * [Boost audio level (volume) without re-encoding](#boost-audio-level--volume--without-re-encoding)
    * [Delay audio](#delay-audio)
    - [Ripping:](#ripping-)
    * [Rip and audio stream (I use this to rip SHOUTcast streams, specifically ours)](#rip-and-audio-stream--i-use-this-to-rip-shoutcast-streams--specifically-ours-)
    * [Rip an M3U8 (video HLS)](#rip-an-m3u8--video-hls-)
    - [Output / Encoding / Streaming:](#output---encoding---streaming-)
    * [Stream a local file to an RTMP server (Periscope specification)](#stream-a-local-file-to-an-rtmp-server--periscope-specification-)


    ---

    ## Media Conversion:

    ### Looping GIF from MP4
    (The `scale` directive will resize it to be 1280px wide and maintain the relative matching height)
    ```
    ffmpeg -i file.mov -vf "fps=10,scale=1280:-1" -loop 1 output.gif
    ffmpeg -i input.mp4 -vf "fps=10,scale=1280:-1" -loop 1 output.gif
    ```

    ## Boost audio level (volume) without re-encoding
    ### Convert FLV to MP4 without full re-encode
    ```
    ffmpeg -i in.mp4 -vcodec copy -af "volume=10dB" out.mp4
    ffmpeg -i in.flv -vcodec copy out.mp4
    ```

    ## Convert FLV to MP4 without full re-encode
    ---

    ## Adjustments / Processing:

    ### Boost audio level (volume) without re-encoding
    ```
    ffmpeg -i in.flv -vcodec copy out.mp4
    ffmpeg -i in.mp4 -vcodec copy -af "volume=10dB" out.mp4
    ```

    ## Delay audio
    ---

    ### Delay audio
    ```
    ffmpeg -i "in.mp4" -itsoffset 0.3 -i "in.mp4" -map 0:v -map 1:a -vcodec copy -acodec copy "out.mp4"
    ```

    ## Rip and audio stream (I use this to rip SHOUTcast streams, specifically ours)
    ---

    ## Ripping:

    ### Rip and audio stream (I use this to rip SHOUTcast streams, specifically ours)
    ```
    ffmpeg -y -i http://geostream.cdn.shoutdrive.com:80/sd-mp3 out.mp3
    ```

    ## Rip an M3U8 (video HLS)
    ---

    ### Rip an M3U8 (video HLS)
    ```
    ffmpeg -i "http://on-demand.cdn.shoutdrive.com/mixes/service/2018-April-22_Thee-O/play.m3u8" -c copy -bsf:a aac_adtstoasc out.mp4
    ```

    ## Stream a local file to an RTMP server (Periscope specification)
    ---

    ## Output / Encoding / Streaming:

    ### Stream a local file to an RTMP server (Periscope specification)
    ```
    ffmpeg -i FILE.mp4 -crf 30 -preset ultrafast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 92k -vcodec libx264 -x264-params keyint=60:no-scenecut=1 -r 30 -b:v 3250k -s 1280x720 -f flv rtmp://ca.pscp.tv:80/x/STREAM_KEY_HERE;
    ```
    ```

    ---
  14. acceptableEngineering revised this gist Mar 6, 2020. 1 changed file with 6 additions and 0 deletions.
    6 changes: 6 additions & 0 deletions FFmpeg-Recipes.md
    View file
    Original file line number Diff line number Diff line change
    @@ -2,6 +2,12 @@ These are FFmpeg commands I use on a regular basis and rather than keeping them

    For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis:

    ## Create high-quality looping GIF from video file
    (The `scale` directive will resize it to be 1280px wide and maintain the relative matching height)
    ```
    ffmpeg -i file.mov -vf "fps=10,scale=1280:-1" -loop 1 output.gif
    ```

    ## Boost audio level (volume) without re-encoding
    ```
    ffmpeg -i in.mp4 -vcodec copy -af "volume=10dB" out.mp4
  15. acceptableEngineering revised this gist Aug 20, 2018. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion FFmpeg-Recipes.md
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    Original file line number Diff line number Diff line change
    @@ -7,7 +7,7 @@ For the sake of simplicity, the filenames I use in the examples below are `in.mp
    ffmpeg -i in.mp4 -vcodec copy -af "volume=10dB" out.mp4
    ```

    ## Convert FLV to MP4
    ## Convert FLV to MP4 without full re-encode
    ```
    ffmpeg -i in.flv -vcodec copy out.mp4
    ```
  16. acceptableEngineering revised this gist Jul 30, 2018. 1 changed file with 28 additions and 1 deletion.
    29 changes: 28 additions & 1 deletion FFmpeg-Recipes.md
    View file
    Original file line number Diff line number Diff line change
    @@ -1,6 +1,33 @@
    These are FFmpeg commands I use on a regular basis and rather than keeping them to myself I figured it'd be good to share!

    For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis:

    # Boost audio level (volume) without reencoding
    ## Boost audio level (volume) without re-encoding
    ```
    ffmpeg -i in.mp4 -vcodec copy -af "volume=10dB" out.mp4
    ```

    ## Convert FLV to MP4
    ```
    ffmpeg -i in.flv -vcodec copy out.mp4
    ```

    ## Delay audio
    ```
    ffmpeg -i "in.mp4" -itsoffset 0.3 -i "in.mp4" -map 0:v -map 1:a -vcodec copy -acodec copy "out.mp4"
    ```

    ## Rip and audio stream (I use this to rip SHOUTcast streams, specifically ours)
    ```
    ffmpeg -y -i http://geostream.cdn.shoutdrive.com:80/sd-mp3 out.mp3
    ```

    ## Rip an M3U8 (video HLS)
    ```
    ffmpeg -i "http://on-demand.cdn.shoutdrive.com/mixes/service/2018-April-22_Thee-O/play.m3u8" -c copy -bsf:a aac_adtstoasc out.mp4
    ```

    ## Stream a local file to an RTMP server (Periscope specification)
    ```
    ffmpeg -i FILE.mp4 -crf 30 -preset ultrafast -acodec aac -strict experimental -ar 44100 -ac 2 -b:a 92k -vcodec libx264 -x264-params keyint=60:no-scenecut=1 -r 30 -b:v 3250k -s 1280x720 -f flv rtmp://ca.pscp.tv:80/x/STREAM_KEY_HERE;
    ```
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    For the sake of simplicity, the filenames I use in the examples below are `in.mp4` and `out.mp4`, though you can use your imagination to picture `blah.mov` or `audio.wav` on a case-by-case basis:

    # Boost audio level (volume) without reencoding
    ```
    ffmpeg -i in.mp4 -vcodec copy -af "volume=10dB" out.mp4
    ```