[FFmpeg-devel] [PATCH] avcodec/mediacodec: Add support of dynamic bitrate

Dmitrii Okunev xaionaro at gmail.com
Wed May 29 01:08:39 EEST 2024


Sorry for re-posting the patch twice. To send to the mailing list I had 
to change the settings of my local postfix and made a mistake.

Anyway, just for convenience providing the list of changes since the 
previous revision of the patch:

< on fly. This commit add possibility to use it.
---
 > on fly. This commit adds capability to use it.
32c15
<     ffmpeg -listen 1 -i rtmp://0.0.0.0:1935/live/myStream -c:v 
hevc_mediacodec -bitrate_ctrl_socket /run/bitrate.sock -b:v 8M -f rtsp 
rtsp://127.0.0.1:1935/live/reEncoded
---
 >     ffmpeg -f flv -i rtmp://0.0.0.0:1935/live/myStream -c:v 
hevc_mediacodec -bitrate_ctrl_socket /run/bitrate.sock -b:v 8M -f flv 
rtmp://127.0.0.1:1935/live/reEncoded
34c17
< An example of changing the bitrate to 1000 BPS:
---
 > An example of changing the bitrate to 1000 Kbps:
36c19
<     printf '%016X' 1000 | xxd -r -p | socat -u STDIN 
UNIX:/run/bitrate.sock
---
 >     printf '%016X' 1000000 | xxd -r -p | socat -u STDIN 
UNIX:/run/bitrate.sock
66c49
< index 96c886666a..fa288b2acc 100644
---
 > index 96c886666a..fe0e291cad 100644
93c76
< +                                    const FFAMediaFormat* format_ctx)
---
 > +                                    const FFAMediaFormat *format_ctx)
131,132c114,115
< +static int mediacodec_ndk_setParameters(FFAMediaCodec* ctx,
< +                                    const FFAMediaFormat* format_ctx)
---
 > +static int mediacodec_ndk_setParameters(FFAMediaCodec *ctx,
 > +                                    const FFAMediaFormat *format_ctx)

Please let me know if I should've amended the patch differently. I'm a 
spoiled GitHub person, so I'm open to guidance/feedback :)

Best regards, Dmitrii.


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