Video File Size worksheet

1. Video bitrate: 2.63 Mbps

1. Change the length to seconds, since bitrates are per second

   $1\times \mathrm{3,600}+28\times 60+0$$=\mathrm{5,280}\text{\hspace{0.17em}s}$

2. Turn the size into bits and divide by the seconds to see the total bitrate that fits

   $\frac{\mathrm{2,000,000,000}\text{\hspace{0.17em}bytes}\times 8}{\mathrm{5,280}\text{\hspace{0.17em}s}\times \mathrm{1,000}}$$=\mathrm{3,030.303}\text{\hspace{0.17em}kbps}$

3. Take away the audio's share to leave the video bitrate, then divide by 1,000 for Mbps

   $\mathrm{3,030.303}\text{\hspace{0.17em}kbps}-400\text{\hspace{0.17em}kbps}$$=\mathrm{2,630.303}\text{\hspace{0.17em}kbps}$$=2.630303\text{\hspace{0.17em}Mbps}$

2. File size: 7.754 GB

1. Change the length to seconds, since bitrates are per second

   $2\times \mathrm{3,600}+24\times 60+0$$=\mathrm{8,640}\text{\hspace{0.17em}s}$

2. Change the video bitrate to kbps so it matches the audio

   $7\text{\hspace{0.17em}Mbps}\times \mathrm{1,000}$$=\mathrm{7,000}\text{\hspace{0.17em}kbps}$

3. Add the video and all the audio tracks to get the total bitrate

   $\mathrm{7,000}+180\times 1$$=\mathrm{7,180}\text{\hspace{0.17em}kbps}$

4. Multiply the bitrate by 1,000 (kbps to bits per second) and by the seconds to get bits, then divide by 8 bits per byte

   $\frac{\mathrm{7,180}\times \mathrm{1,000}\times \mathrm{8,640}}{8}$$=\mathrm{7,754,400,000}\text{\hspace{0.17em}bytes}$

5. Change bytes to gigabytes (1 GB = 1,000,000,000 bytes), which are easier to read

   $\frac{\mathrm{7,754,400,000}}{\mathrm{1,000,000,000}}$$=7.7544\text{\hspace{0.17em}GB}$

3. File size: 10.307 GB

1. Change the length to seconds, since bitrates are per second

   $2\times \mathrm{3,600}+44\times 60+0$$=\mathrm{9,840}\text{\hspace{0.17em}s}$

2. Change the video bitrate to kbps so it matches the audio

   $8\text{\hspace{0.17em}Mbps}\times \mathrm{1,000}$$=\mathrm{8,000}\text{\hspace{0.17em}kbps}$

3. Add the video and all the audio tracks to get the total bitrate

   $\mathrm{8,000}+190\times 2$$=\mathrm{8,380}\text{\hspace{0.17em}kbps}$

4. Multiply the bitrate by 1,000 (kbps to bits per second) and by the seconds to get bits, then divide by 8 bits per byte

   $\frac{\mathrm{8,380}\times \mathrm{1,000}\times \mathrm{9,840}}{8}$$=\mathrm{10,307,400,000}\text{\hspace{0.17em}bytes}$

5. Change bytes to gigabytes (1 GB = 1,000,000,000 bytes), which are easier to read

   $\frac{\mathrm{10,307,400,000}}{\mathrm{1,000,000,000}}$$=10.3074\text{\hspace{0.17em}GB}$

4. File size: 7.211 GB

1. Change the length to seconds, since bitrates are per second

   $1\times \mathrm{3,600}+32\times 60+0$$=\mathrm{5,520}\text{\hspace{0.17em}s}$

2. Change the video bitrate to kbps so it matches the audio

   $10\text{\hspace{0.17em}Mbps}\times \mathrm{1,000}$$=\mathrm{10,000}\text{\hspace{0.17em}kbps}$

3. Add the video and all the audio tracks to get the total bitrate

   $\mathrm{10,000}+225\times 2$$=\mathrm{10,450}\text{\hspace{0.17em}kbps}$

4. Multiply the bitrate by 1,000 (kbps to bits per second) and by the seconds to get bits, then divide by 8 bits per byte

   $\frac{\mathrm{10,450}\times \mathrm{1,000}\times \mathrm{5,520}}{8}$$=\mathrm{7,210,500,000}\text{\hspace{0.17em}bytes}$

5. Change bytes to gigabytes (1 GB = 1,000,000,000 bytes), which are easier to read

   $\frac{\mathrm{7,210,500,000}}{\mathrm{1,000,000,000}}$$=7.2105\text{\hspace{0.17em}GB}$

5. Video bitrate: 2.921 Mbps

1. Change the length to seconds, since bitrates are per second

   $1\times \mathrm{3,600}+26\times 60+0$$=\mathrm{5,160}\text{\hspace{0.17em}s}$

2. Turn the size into bits and divide by the seconds to see the total bitrate that fits

   $\frac{\mathrm{2,000,000,000}\text{\hspace{0.17em}bytes}\times 8}{\mathrm{5,160}\text{\hspace{0.17em}s}\times \mathrm{1,000}}$$=\mathrm{3,100.7752}\text{\hspace{0.17em}kbps}$

3. Take away the audio's share to leave the video bitrate, then divide by 1,000 for Mbps

   $\mathrm{3,100.7752}\text{\hspace{0.17em}kbps}-180\text{\hspace{0.17em}kbps}$$=\mathrm{2,920.7752}\text{\hspace{0.17em}kbps}$$=2.920775\text{\hspace{0.17em}Mbps}$

6. Video bitrate: 2.637 Mbps

1. Change the length to seconds, since bitrates are per second

   $2\times \mathrm{3,600}+20\times 60+0$$=\mathrm{8,400}\text{\hspace{0.17em}s}$

2. Turn the size into bits and divide by the seconds to see the total bitrate that fits

   $\frac{\mathrm{3,000,000,000}\text{\hspace{0.17em}bytes}\times 8}{\mathrm{8,400}\text{\hspace{0.17em}s}\times \mathrm{1,000}}$$=\mathrm{2,857.1429}\text{\hspace{0.17em}kbps}$

3. Take away the audio's share to leave the video bitrate, then divide by 1,000 for Mbps

   $\mathrm{2,857.1429}\text{\hspace{0.17em}kbps}-220\text{\hspace{0.17em}kbps}$$=\mathrm{2,637.1429}\text{\hspace{0.17em}kbps}$$=2.637143\text{\hspace{0.17em}Mbps}$

7. Video bitrate: 1.612 Mbps

1. Change the length to seconds, since bitrates are per second

   $2\times \mathrm{3,600}+24\times 60+0$$=\mathrm{8,640}\text{\hspace{0.17em}s}$

2. Turn the size into bits and divide by the seconds to see the total bitrate that fits

   $\frac{\mathrm{2,000,000,000}\text{\hspace{0.17em}bytes}\times 8}{\mathrm{8,640}\text{\hspace{0.17em}s}\times \mathrm{1,000}}$$=\mathrm{1,851.8519}\text{\hspace{0.17em}kbps}$

3. Take away the audio's share to leave the video bitrate, then divide by 1,000 for Mbps

   $\mathrm{1,851.8519}\text{\hspace{0.17em}kbps}-240\text{\hspace{0.17em}kbps}$$=\mathrm{1,611.8519}\text{\hspace{0.17em}kbps}$$=1.611852\text{\hspace{0.17em}Mbps}$

8. File size: 4.428 GB

1. Change the length to seconds, since bitrates are per second

   $1\times \mathrm{3,600}+22\times 60+0$$=\mathrm{4,920}\text{\hspace{0.17em}s}$

2. Change the video bitrate to kbps so it matches the audio

   $7\text{\hspace{0.17em}Mbps}\times \mathrm{1,000}$$=\mathrm{7,000}\text{\hspace{0.17em}kbps}$

3. Add the video and all the audio tracks to get the total bitrate

   $\mathrm{7,000}+200\times 1$$=\mathrm{7,200}\text{\hspace{0.17em}kbps}$

4. Multiply the bitrate by 1,000 (kbps to bits per second) and by the seconds to get bits, then divide by 8 bits per byte

   $\frac{\mathrm{7,200}\times \mathrm{1,000}\times \mathrm{4,920}}{8}$$=\mathrm{4,428,000,000}\text{\hspace{0.17em}bytes}$

5. Change bytes to gigabytes (1 GB = 1,000,000,000 bytes), which are easier to read

   $\frac{\mathrm{4,428,000,000}}{\mathrm{1,000,000,000}}$$=4.428\text{\hspace{0.17em}GB}$

9. Video bitrate: 2.705 Mbps

1. Change the length to seconds, since bitrates are per second

   $1\times \mathrm{3,600}+31\times 60+0$$=\mathrm{5,460}\text{\hspace{0.17em}s}$

2. Turn the size into bits and divide by the seconds to see the total bitrate that fits

   $\frac{\mathrm{2,000,000,000}\text{\hspace{0.17em}bytes}\times 8}{\mathrm{5,460}\text{\hspace{0.17em}s}\times \mathrm{1,000}}$$=\mathrm{2,930.4029}\text{\hspace{0.17em}kbps}$

3. Take away the audio's share to leave the video bitrate, then divide by 1,000 for Mbps

   $\mathrm{2,930.4029}\text{\hspace{0.17em}kbps}-225\text{\hspace{0.17em}kbps}$$=\mathrm{2,705.4029}\text{\hspace{0.17em}kbps}$$=2.705403\text{\hspace{0.17em}Mbps}$

10. File size: 4.618 GB

1. Change the length to seconds, since bitrates are per second

   $1\times \mathrm{3,600}+26\times 60+0$$=\mathrm{5,160}\text{\hspace{0.17em}s}$

2. Change the video bitrate to kbps so it matches the audio

   $7\text{\hspace{0.17em}Mbps}\times \mathrm{1,000}$$=\mathrm{7,000}\text{\hspace{0.17em}kbps}$

3. Add the video and all the audio tracks to get the total bitrate

   $\mathrm{7,000}+160\times 1$$=\mathrm{7,160}\text{\hspace{0.17em}kbps}$

4. Multiply the bitrate by 1,000 (kbps to bits per second) and by the seconds to get bits, then divide by 8 bits per byte

   $\frac{\mathrm{7,160}\times \mathrm{1,000}\times \mathrm{5,160}}{8}$$=\mathrm{4,618,200,000}\text{\hspace{0.17em}bytes}$

5. Change bytes to gigabytes (1 GB = 1,000,000,000 bytes), which are easier to read

   $\frac{\mathrm{4,618,200,000}}{\mathrm{1,000,000,000}}$$=4.6182\text{\hspace{0.17em}GB}$