user15971: This is a follow-up question from my previous question HERE. I'm trying to convert a caption-embedded .mp4 video into a .ts file, simply changing the container format. But once I convert the video, the caption looks different. Not sure what's going on.
Here is the sample .mp4 video. At second 00:34" for example, you see the caption says GARBLED CAPTION INSERTED. But that's not there in the converted .ts file. 
What's happening? Any clues?! 

user1871: The subtitles in the MP4 is a mov_text (tx3g) stream which isn't supported in MPEG-TS.
MPEG-TS support either DVD subtitles or DVB teletext. The former is a bitmap subtitle format and ffmpeg can't convert text to bitmap. FFmpeg has no encoder for the latter. Your best bet is to burn the subtitles but this means re-encoding the video.
ffmpeg -i in.mp4 -vf subtitles=in.mp4 -c:v libx264 -c:a copy out.ts


15971: <p>This is a follow-up question from my previous question <a href="https://video.stackexchange.com/questions/27854/errors-in-converting-mp4-to-ts-with-ffmpeg/27855#27855">HERE</a>. I'm trying to convert a caption-embedded .<code>mp4</code> video into a .<code>ts</code> file, simply changing the container format. But once I convert the video, the caption looks different. Not sure what's going on.</p>

<p><a href="http://dropbox.com/s/697c7tuqgkc0bv0/test.mp4?dl=0" rel="nofollow noreferrer">Here</a> is the sample .<code>mp4</code> video. At second 00:34" for example, you see the caption says <code>GARBLED CAPTION INSERTED</code>. But that's not there in the converted <code>.ts</code> file. </p>

<p>What's happening? Any clues?! </p>
 1871: <p>The subtitles in the MP4 is a mov_text (tx3g) stream which isn't supported in MPEG-TS.</p>

<p>MPEG-TS support either DVD subtitles or DVB teletext. The former is a bitmap subtitle format and ffmpeg can't convert text to bitmap. FFmpeg has no encoder for the latter. Your best bet is to burn the subtitles but this means re-encoding the video.</p>

<pre><code>ffmpeg -i in.mp4 -vf subtitles=in.mp4 -c:v libx264 -c:a copy out.ts
</code></pre>
