Only for reference.

On my old Pc
- CPU: AMD Athlon(tm) X2 Dual-Core QL-62 2GHz
- RAM: 4GB
- OS: Linux UbuntuStudio 16.04 LTS 64bit (Xfce)

Cin-GG vers:
  cinelerra-5.1-ub16.04-20190228.x86_64-static
Project-->
  - Setting Format= 1080p @29.97fps 16/9 yuva420
  - video sources:  .mp4, 1080p, 29.97fps (variable)
  - Total time: 1 minute

123456789012345678901234567890123456789012345678901234567890123456789012345
         1         2         3         4         5         6         7
---------------------------------------------------------------------------
Container| Audio         | Video         |Rendering | Size |Quality |CPU
         |  48kHz stereo |               |  took    | [MB] | Only4  |[%]
  ffmpeg |  (Preset)     |  (Preset)     |          |      | MyEyes |
---------+---------------+---------------+----------+------+--------+------
mp4     *|h264.mp4       |h264.mp4       |   40m49s | 30.8 | A      | 60
         |aac            |High           |          |      |        |
         |       125 kbps|      4109 kbps|          |      |        |
---------+---------------+---------------+----------+------+--------+------
pro     *|acc256k.pro    |med422p10.pro  |   18m00s |1000  | A      |100
         |aac            |yuv422p10      |          |      |        |
         |       249 kbps|    139528 kbps|          |      |        |
---------+---------------+---------------+----------+------+--------+------
mkv     *|acc256k.pro    |flac.mkv       |   20m47s |1000  | B      |100+
         |flac 24bit     |ffv1           |          |      |        |
         |               |    134545 kbps|          |      |        |
---------+---------------+---------------+----------+------+--------+------
youtube *|stereo.youtube |hd.youtube     |   34m58s | 10.6 | A-     | 60
         |opus           |vp9 (Profile 0)|          |      |        |
         |               |      1411 kbps|          |      |        |
---------+---------------+---------------+----------+------+--------+------
youtube *|stereo_with_   |hd_h264.youtube|   46m01s | 60.2 | A-     | 60
         |_h264.youtube  |h264 (High)    |          |      |        |
         |aac    373 kbps|      8021 kbps|          |      |        |
---------+---------------+---------------+----------+------+--------+------
mp4     *|faststart_h264.|faststart_h264.| 1h08m27s | 11.1 | A-     | 60
         |.mp4           |.mp4 h264(High)|          |      |        |
         |aac    125 kbps|      1477 kbps|          |      |        |
---------+---------------+---------------+----------+------+--------+------
dvd     *|dvd.dvd        |dvd.dvd        |   13m53s | 18.3 | B      | 20
         |ac3            |mpeg2video     |          |      |        |
         |       192 kbps|(Main)2436 kbps|          |      |        |
---------+---------------+---------------+----------+------+--------+------
webm    *|webm.webm      |vp9_1920x1080_ |   38m21s |  2.9 | C      | 60
         |vorbis         |_~fps.webm     |          |      |        |
         |               |vp9(P0)384 kbps|          |      |        |
---------+---------------+---------------+----------+------+--------+------


*Preset value by Cinelerra-GG & ffmpeg: default settings (preset);

- Quality (Only for my eyes) and CPU usage fields are subjective by me
  with "ffplay videofile.*" execute command.