Output video is garbled, single frames output are fine

[fyxme]

I'm having issues when exporting the video. It does render but it does not render correctly.
I'm trying to make a compilation of videos. The first video is always fine but the rest are all garbled.

OS : OS X EL Capitan v.10.11.6

This is how I concatenate all the clips and add the audio to it.
I used the write_videofile parameters from issue #356 (direct link to comment) but I'm still getting the issue...

final_audio = mp.AudioFileClip(music_fp)

# clip_list is a list of CompositeVideoClip
final_clip = mp.concatenate_videoclips(clip_list).fadein(2).fadeout(2)

final_clip = final_clip.set_audio(final_audio.set_duration(int(final_clip.duration)))

final_clip.write_videofile(
        output_fp,
        verbose=True,
        codec="libx264",
        audio_codec='aac',
        temp_audiofile='temp-audio.m4a',
        remove_temp=True,
        preset="medium",
        ffmpeg_params=["-profile:v","baseline", "-level","3.0","-pix_fmt", "yuv420p"])

Garbled output example

I know this shouldn't be posted here but more on Stackoverflow or the moviepy subreddit but it seems to take forever to get even a single response on either of those. Thanks in advance for your help

[fyxme]

I managed to fix this, I needed to add a method="compose" parameter to concatenate_videoclips() most likely because my clips might have been of different sizes.

[keikoro]

Hi @Hexagonist, will close this issue as you managed to resolve your problem.