Answers.Body: <p>The overlay filter syncs by timestamps i.e. it overlays 2nd input's frame with timestamp X on main input's frame with timestamp X.  Barring certain circumstances like the use of <code>-copyts</code>, timestamps start from zero. So, when your 2nd lower-third overlay enters its active timeline, there are no corresponding frames from the secondary input.</p>
  
  <p>Solution: offset the input's timestamps to start from overlay start time.</p>
  
  <pre><code>ffmpeg -hide_banner -loglevel 56 -report \
      -ss 00:25:00 \
      -i 00005.MTS \
      -i ./constants/edu_logo.svg \
      -i ./constants/name_animation_dr_johnson.mp4 \
      -itsoffset 15 -i ./constants/name_animation_dr_halmilton.mp4 \
      -filter_complex "[1:v]scale=400:122[logo]; \
      [0:v][logo]overlay=x=main_w-overlay_w-80:y=main_h-overlay_h-80[v-l]; \
      [v-l][2:v]overlay=x=0:y=0:enable='between(t,0,10.5)'[v-l-a]; \
      [v-l-a][3:v]overlay=x=0:y=0:enable='between(t,15,25.5)'[v-l-a-a]" \
      -vcodec libx264 -preset fast \
              -flags +cgop -pix_fmt yuv420p \
              -b:v 2M -movflags +faststart \
      -map "[v-l-a-a]" -map 0:a -t 30 my_test.mp4
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-12T20:35:56.800Z
Answers.Text: the magic has returned.  Your answer is perfect.  I truly appreciate your help and expertise.  Thank you!
Answers.UserDisplayName: Mark Cain
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-12T20:21:40.237Z
Answers.LastActivityDate: 2019-08-12T20:21:40.237Z
Answers.UserDisplayName: Gyan
Body: <p>On a video I am producing, I am overlaying a digital on screen graphic on the lower right corner (branding logo).  I am overlaying an 11 second two-tiered lower third at the beginning of the video (Speaker's Name with their title below their name).  Later in the video a second speaker is introduced and I am trying to add a second two-tiered lower third for the second speaker.  I do this on a weekly basis and everything before the second lower third works like magic.  However, the second lower third never appears.  Here is the code I am using:</p>
  
  <pre><code>ffmpeg -hide_banner -loglevel 56 -report \
      -ss 00:25:00 \
      -i 00005.MTS \
      -i ./constants/edu_logo.svg \
      -i ./constants/name_animation_dr_johnson.mp4 \
      -i ./constants/name_animation_dr_halmilton.mp4 \
      -filter_complex "[1:v]scale=400:122[logo]; \
      [0:v][logo]overlay=x=main_w-overlay_w-80:y=main_h-overlay_h-80[v-l]; \
      [v-l][2:v]overlay=x=0:y=0:enable='between(t,0,10.5)'[v-l-a]; \
      [v-l-a][3:v]overlay=x=0:y=0:enable='between(t,15,25.5)'[v-l-a-a]" \
      -vcodec libx264 -preset fast \
              -flags +cgop -pix_fmt yuv420p \
              -b:v 2M -movflags +faststart \
      -map "[v-l-a-a]" -map 0:a -t 30 my_test.mp4
  </code></pre>
  
  <p>What do I need to modify to get the second lower third to appear?</p>
  
  <p>Ubuntu Studio 18.04.2 LTS<br>
  ffmpeg version 3.4.6-0ubuntu0.18.04.1<br>
  i7-2600k @ 3.4GHz<br>
  8 Gigs of RAM<br>
  GeForce GTX 970</p>
  
Tags: <ffmpeg>
Title: ffmpeg: Second lower third does not appear
UserDisplayName: Mark Cain
ThreadText: # ffmpeg: Second lower third does not appear
  
  (Asked by: username_0 on 2019-08-12)
  
  On a video I am producing, I am overlaying a digital on screen graphic on the lower right corner (branding logo). I am overlaying an 11 second two-tiered lower third at the beginning of the video (Speaker's Name with their title below their name). Later in the video a second speaker is introduced and I am trying to add a second two-tiered lower third for the second speaker. I do this on a weekly basis and everything before the second lower third works like magic. However, the second lower third never appears. Here is the code I am using:
  
  ```
  ffmpeg -hide_banner -loglevel 56 -report \
      -ss 00:25:00 \
      -i 00005.MTS \
      -i ./constants/edu_logo.svg \
      -i ./constants/name_animation_dr_johnson.mp4 \
      -i ./constants/name_animation_dr_halmilton.mp4 \
      -filter_complex "[1:v]scale=400:122[logo]; \
      [0:v][logo]overlay=x=main_w-overlay_w-80:y=main_h-overlay_h-80[v-l]; \
      [v-l][2:v]overlay=x=0:y=0:enable='between(t,0,10.5)'[v-l-a]; \
      [v-l-a][3:v]overlay=x=0:y=0:enable='between(t,15,25.5)'[v-l-a-a]" \
      -vcodec libx264 -preset fast \
              -flags +cgop -pix_fmt yuv420p \
              -b:v 2M -movflags +faststart \
      -map "[v-l-a-a]" -map 0:a -t 30 my_test.mp4
  
  ```
  
  What do I need to modify to get the second lower third to appear?
  
  Ubuntu Studio 18.04.2 LTS  
  ffmpeg version 3.4.6-0ubuntu0.18.04.1  
  i7-2600k @ 3.4GHz  
  8 Gigs of RAM  
  GeForce GTX 970
  
  **Tags:** ffmpeg
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2019-08-12. Score: 3 | Accepted answer
  
  The overlay filter syncs by timestamps i.e. it overlays 2nd input's frame with timestamp X on main input's frame with timestamp X. Barring certain circumstances like the use of `-copyts`, timestamps start from zero. So, when your 2nd lower-third overlay enters its active timeline, there are no corresponding frames from the secondary input.
  
  Solution: offset the input's timestamps to start from overlay start time.
  
  ```
  ffmpeg -hide_banner -loglevel 56 -report \
      -ss 00:25:00 \
      -i 00005.MTS \
      -i ./constants/edu_logo.svg \
      -i ./constants/name_animation_dr_johnson.mp4 \
      -itsoffset 15 -i ./constants/name_animation_dr_halmilton.mp4 \
      -filter_complex "[1:v]scale=400:122[logo]; \
      [0:v][logo]overlay=x=main_w-overlay_w-80:y=main_h-overlay_h-80[v-l]; \
      [v-l][2:v]overlay=x=0:y=0:enable='between(t,0,10.5)'[v-l-a]; \
      [v-l-a][3:v]overlay=x=0:y=0:enable='between(t,15,25.5)'[v-l-a-a]" \
      -vcodec libx264 -preset fast \
              -flags +cgop -pix_fmt yuv420p \
              -b:v 2M -movflags +faststart \
      -map "[v-l-a-a]" -map 0:a -t 30 my_test.mp4
  
  ```
  
  > **Comments:**
  > **username_0**: the magic has returned.  Your answer is perfect.  I truly appreciate your help and expertise.  Thank you!  
  
  ---
  
  