Hello Nicolas,
Bellow you can find the bechmarks using `ffmpeg -benchmark` option.
1 - master
./ffmpeg -benchmark -t 10 -framerate 25 -f x11grab -i ":1+0,0 1920x1080"
output1master.mp4
ffmpeg version N-109782-g458ae405ef Copyright (c) 2000-2023 the FFmpeg
developers
built with gcc 11 (Ubuntu 11.3.0-1ubuntu1~22.04)
configuration:
libavutil 57. 44.100 / 57. 44.100
libavcodec 59. 63.100 / 59. 63.100
libavformat 59. 38.100 / 59. 38.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 56.100 / 8. 56.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
[x11grab @ 0x564d03e165c0] Stream #0: not enough frames to estimate rate;
consider increasing probesize
Input #0, x11grab, from ':1+0,0 1920x1080':
Duration: N/A, start: 1675963927.428661, bitrate: 3379200 kb/s
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 3520x1200, 3379200
kb/s, 25 fps, 1000k tbr, 1000k tbn
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'output1master.mp4':
Metadata:
encoder : Lavf59.38.100
Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, progressive),
3520x1200, q=2-31, 200 kb/s, 25 fps, 12800 tbn
Metadata:
encoder : Lavc59.63.100 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame= 251 fps= 25 q=31.0 Lsize= 5720kB time=00:00:10.00
bitrate=4686.0kbits/s speed=0.996x
video:5718kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: 0.034719%
bench: utime=13.142s stime=0.307s rtime=10.039s
bench: maxrss=207576kB
2 - master
./ffmpeg -benchmark -t 10 -framerate 25 -f x11grab -window_id 0x5600008 -i
":1+0,0 1920x1080" output2master.mp4
ffmpeg version N-109782-g458ae405ef Copyright (c) 2000-2023 the FFmpeg
developers
built with gcc 11 (Ubuntu 11.3.0-1ubuntu1~22.04)
configuration:
libavutil 57. 44.100 / 57. 44.100
libavcodec 59. 63.100 / 59. 63.100
libavformat 59. 38.100 / 59. 38.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 56.100 / 8. 56.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
Input #0, x11grab, from ':1+0,0 1920x1080':
Duration: N/A, start: 1675963986.581500, bitrate: 472305 kb/s
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 841x702, 472305 kb/s,
25 fps, 25 tbr, 1000k tbn
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'output2master.mp4':
Metadata:
encoder : Lavf59.38.100
Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, progressive),
841x702, q=2-31, 200 kb/s, 25 fps, 12800 tbn
Metadata:
encoder : Lavc59.63.100 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame= 250 fps= 25 q=31.0 Lsize= 1274kB time=00:00:09.96
bitrate=1047.9kbits/s speed= 1x
video:1272kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: 0.151768%
bench: utime=0.628s stime=1.465s rtime=9.920s
bench: maxrss=52268kB
3 - patch applied
./ffmpeg -benchmark -t 10 -framerate 25 -f x11grab -i ":1+0,0 1920x1080"
output1.mp4
ffmpeg version N-109783-g2352934f8b Copyright (c) 2000-2023 the FFmpeg
developers
built with gcc 11 (Ubuntu 11.3.0-1ubuntu1~22.04)
configuration:
libavutil 57. 44.100 / 57. 44.100
libavcodec 59. 63.100 / 59. 63.100
libavformat 59. 38.100 / 59. 38.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 56.100 / 8. 56.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
[x11grab @ 0x55e86905b5c0] Stream #0: not enough frames to estimate rate;
consider increasing probesize
Input #0, x11grab, from ':1+0,0 1920x1080':
Duration: N/A, start: 1675964519.431271, bitrate: 3379200 kb/s
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 3520x1200, 3379200
kb/s, 25 fps, 1000k tbr, 1000k tbn
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'output1.mp4':
Metadata:
encoder : Lavf59.38.100
Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, progressive),
3520x1200, q=2-31, 200 kb/s, 25 fps, 12800 tbn
Metadata:
encoder : Lavc59.63.100 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame= 250 fps= 25 q=31.0 Lsize= 5723kB time=00:00:09.96
bitrate=4706.8kbits/s speed=0.996x
video:5721kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: 0.034227%
bench: utime=14.005s stime=0.168s rtime=9.998s
bench: maxrss=207828kB
4 - patch applied
./ffmpeg -benchmark -t 10 -framerate 25 -f x11grab -window_id 0x5600008 -i
":1+0,0 1920x1080" output2.mp4
ffmpeg version N-109783-g2352934f8b Copyright (c) 2000-2023 the FFmpeg
developers
built with gcc 11 (Ubuntu 11.3.0-1ubuntu1~22.04)
configuration:
libavutil 57. 44.100 / 57. 44.100
libavcodec 59. 63.100 / 59. 63.100
libavformat 59. 38.100 / 59. 38.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 56.100 / 8. 56.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
Input #0, x11grab, from ':1+0,0 1920x1080':
Duration: N/A, start: 1675964455.191272, bitrate: 472305 kb/s
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 841x702, 472305 kb/s,
25 fps, 24.83 tbr, 1000k tbn
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'output2.mp4':
Metadata:
encoder : Lavf59.38.100
Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p(tv, progressive),
841x702, q=2-31, 200 kb/s, 24.83 fps, 19072 tbn
Metadata:
encoder : Lavc59.63.100 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
frame= 250 fps= 25 q=31.0 Lsize= 961kB time=00:00:10.02 bitrate=
785.0kbits/s speed=1.01x
video:959kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: 0.199722%
bench: utime=1.624s stime=0.049s rtime=9.920s
bench: maxrss=51996kB
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