Output file has only audio no video in ios, Working fine on Android.

[dheerajrijhwani]

Description
I am using ffmpeg_kit_flutter in my application. I am trying to add background music, text and gif on a video input. When I am creating the video from android it is working fine on android as well as ios, But when I am trying to create the output from ios it's not working on both platforms. I also notice that the video created from ios does not works on chrome browser, It is only showing audio in chrome

Expected behavior
The video generated from ios should be similar to android, because the commands are same and parameters are same as well.

Current behavior
Right now the video generated from ios does not work on ios and chrome, But it works on android platform. I am using flutter default video player to see the videos.

To Reproduce
You can try to run the command on ios and android to get logs.

Screenshots
No Screenshots, But attached the logs and video below.

Logs
ios-logs.txt
android-logs.txt

Environment

• Platform: Android/Flutter/iOS/

• Version: v4.5.1-LTS

• Flutter Version: 3.0.5

Other
Command which I am executing in android.

-i /data/user/0/com.consultingwhiz.sparksfly/cache/REC5962783986141428937.mp4 -i /data/user/0/com.consultingwhiz.sparksfly/cache/file_01.mp3 -stream_loop 2 -i /data/user/0/com.consultingwhiz.sparksfly/cache/gif_file.gif -filter_complex [0:v][2:v]overlay=(main_w-overlay_w) - 20:(main_h-overlay_h) - 20,drawtext=text=Discuss what you are looking for in a partner?:x=(w-text_w)/2:y=(h-text_h)-20:fontsize=24:fontcolor=white:fontfile=/data/user/0/com.consultingwhiz.sparksfly/cache/fonts.ttf;[0:a][1:a]amerge=inputs=2[a] -map 0:v -map [a] -q:v 4 -q:a 4 /data/user/0/com.consultingwhiz.sparksfly/cache/21843.mp4

---

Command which I am executing in IOS.

-i /var/mobile/Containers/Data/Application/619FAB12-A4F8-459D-A9F4-32D500390E03/Documents/camera/videos/REC_65A89F93-D78C-4924-A228-FC3E6E439CE5.mp4 -i /var/mobile/Containers/Data/Application/619FAB12-A4F8-459D-A9F4-32D500390E03/Library/Caches/file_01.mp3 -stream_loop 2 -i /var/mobile/Containers/Data/Application/619FAB12-A4F8-459D-A9F4-32D500390E03/Library/Caches/gif_file.gif -filter_complex [0:v][2:v]overlay=(main_w-overlay_w) - 20:(main_h-overlay_h) - 20,drawtext=text=Discuss what you are looking for in a partner?:x=(w-text_w)/2:y=(h-text_h)-20:fontsize=24:fontcolor=white:fontfile=/var/mobile/Containers/Data/Application/619FAB12-A4F8-459D-A9F4-32D500390E03/Library/Caches/fonts.ttf;[0:a][1:a]amerge=inputs=2[a] -map 0:v -map [a] -q:v 4 -q:a 4 /var/mobile/Containers/Data/Application/619FAB12-A4F8-459D-A9F4-32D500390E03/Library/Caches/16428.mp4

---

ios-logs.txt
android-logs.txt

1660058726363954.mp4

[dheerajrijhwani]

I have compare logs on android and ios and I have noticed that Stream #0:0 and Stream #1:0 is different.

IOS:

Stream #0:0 [0x1] (und) : Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 60 kb/s

Stream #0:1 [0x2] (und) : Video: hevc (hvc1 / 0x31637668), yuv420p(tv, smpte170m/bt709/bt709), 480x640, 1130 kb/s

---

Android:

Stream #0:0 [0x1] (eng) : Video: h264 (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709, progressive), 720x480, 3484 kb/s

Stream #1:0 : Audio: mp3, 44100 Hz, stereo, fltp, 193 kb/s

[tanersener]

Input files used are not the same. Therefore output files produced are not the same.

Moreover, commands don't specify any format, codec options for the output files. So, ffmpeg is choosing those things for you. No one can guarantee that ffmpeg won't choose an iOS specific encoder, option that is not available on Android and produce a different file.

So, my suggestion is to produce files with the same audio/video formats first.

This is the video and audio format of the file created on Android.

mpeg4 (mp4v / 0x7634706D), yuv420p(tv, smpte170m/smpte170m/bt709, progressive), 480x720 [SAR 1:1 DAR 2:3], q=2-31, 200 kb/s
aac (mp4a / 0x6134706D), 48000 Hz, 3.0, fltp, 197 kb/s

And this is the file created on iOS.

mpeg4 (mp4v / 0x7634706D), yuv420p(tv, smpte170m/bt709/bt709, progressive), 480x640, q=2-31, 200 kb/s
aac (mp4a / 0x6134706D), 44100 Hz, 3.0, fltp, 197 kb/s

[dheerajrijhwani]

@tanersener I tried with provide same video input file to android and ios. Still the output is same (Not Working). Can you tell what other values or parameters I have to add in the command to set the format and codecs. I am confused on where to put codecs or parameters and what values should I put.

Thanks for your help.

[tanersener]

Well, how about asking google about it?

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